# VIX Contango Indicator for ThinkorSwim

#### reknirt

##### New member
I'm trying to write an indicator plotting percent contango between spot VIX -- last closing VIX price -- and the near month /VX future. I got the idea from an indicator Jeff Augen did here:

In theory the indicator should follow the S&P very closely -- at least until backwardation occurs and the near month contract becomes more expensive than spot VIX.

However, my indicator seems to be very noisy, whereas Augen's follows the S&P extremely closely. My formula for calculating the difference is:

contangoPercent = (NearContract - SpotVIX) / SpotVIX;

I corrected some of the noise by filtering out NaNs and replacing them with the previous bar. But I'm still not sure if my calculation is correct. Here is my code:

Code:
``````def month = GetMonth();
def daysTillExp = Next3rdFriday(2) - 30;
def whichMonth = if daysTillExp > 4 then month
else if daysTillExp < 5 and month == 12
then 1
else if daysTillExp < 5
then month + 1
else double.nan;

def Year = GetYear();
def Year_Ext = Year - 2000;
def agg = AggregationPeriod.day;

def SpotVIX = close("VIX");
def NearContract = if whichMonth == 1
then Close(symbol = "/VXF" + Year_Ext, period = agg)
else if whichMonth == 2
then Close(symbol = "/VXG" + Year_Ext, period = agg)
else if whichMonth == 3
then Close(symbol = "/VXH" + Year_Ext, period = agg)
else if whichMonth == 4
then Close(symbol = "/VXJ" + Year_Ext, period = agg)
else if whichMonth == 5
then Close(symbol = "/VXK" + Year_Ext, period = agg)
else if whichMonth == 6
then Close(symbol = "/VXM" + Year_Ext, period = agg)
else if whichMonth == 7
then Close(symbol = "/VXN" + Year_Ext, period = agg)
else if whichMonth == 8
then Close(symbol = "/VXQ" + Year_Ext, period = agg)
else if whichMonth == 9
then Close(symbol = "/VXU" + Year_Ext, period = agg)
else if whichMonth == 10
then Close(symbol = "/VXV" + Year_Ext, period = agg)
else if whichMonth == 11
then Close(symbol = "/VXX" + Year_Ext, period = agg)
else if whichMonth == 12
then Close(symbol = "/VXZ" + Year_Ext, period = agg)
else double.nan;

# if the calculations on any of the bar return NaN, use the previous bar.

def spotFiltered = if IsNaN(spotVIX) then  spotFiltered[1]  else SpotVIX;
def nearFiltered = if IsNaN(NearContract) then  nearFiltered[1]  else NearContract;

plot contangoPercent = simpleMovingAvg((nearFiltered - spotFiltered) / spotFiltered, 5, 0);
#plot contangoPercent = (NearContract - SpotVIX) / SpotVIX;

plot zeroLine = 0;

addlabel(Close(symbol = "VIX") <= NearContract,"Contango", color.green);
addlabel(Close(symbol = "VIX") > NearContract,"Backwardation", color.red);

# End Code VIX Contango/Normal Backwardation``````

Here is what it currently looks like on an /ES chart

I appreciate any help!

#### rbapf

##### New member
The following is a study which uses the VIX futures to calculate the M1/M2 contango. It appears to work most of the time except for the second half of each December. Can anyone see where I went wrong?

Code:
``````input January = "/VXF";
input February = "/VXG";
input March = "/VXH";
input April = "/VXJ";
input May = "/VXK";
input June = "/VXM";
input July = "/VXN";
input August = "/VXQ";
input September = "/VXU";
input October = "/VXV";
input November = "/VXX";
input December = "/VXZ";

def Year = GetYear();

def JanuaryLength = 31;
def FebruaryLength = if Year % 4 == 0 then 29 else 28;
def MarchLength = 31;
def AprilLength = 30;
def MayLength = 31;
def JuneLength = 30;
def JulyLength = 31;
def AugustLength = 31;
def SeptemberLength = 30;
def OctoberLength = 31;
def NovemberLength = 30;
def DecemberLength = 31;

def Day = GetDayOfMonth(GetYYYYMMDD());
def WeekDay = GetDayOfWeek(GetYYYYMMDD());
def Month = GetMonth();

def MonthLength = if Month == 1 then JanuaryLength else if Month == 2 then FebruaryLength else if Month == 3 then MarchLength else if Month == 4 then AprilLength else if Month == 5 then MayLength else if Month == 6 then JuneLength else if Month == 7 then JulyLength else if Month == 8 then AugustLength else if Month == 9 then SeptemberLength else if Month == 10 then OctoberLength else if Month == 11 then NovemberLength else DecemberLength;

def AdjMonth = if Month == Month[1] then if (Day > MonthLength - 16 and Day < MonthLength - 8 and WeekDay == 3) then if Month == 12 then 1 else Month + 1 else if AdjMonth[1] != Month then AdjMonth[1] else Month else Month;

plot Contango = M2 / M1 - 1;

plot zeros = 0;``````

#### XeoNoX

##### Well-known member
VIP
@reknirt theres no percent of contango, because contango is contango, its like saying its in order or not in order, theres no percent of the order, its either true or false, theres no percent of true or false, its in order or its not. however theres percent of the difference from the spot and the futures .

heres a code from Mobius and AlphaInvestor

you simply have to plug in the mathematical equation for the symbol you want to get the percent from and plug in the formula for percent.

plot percent = ((NearContract - SpotVIX) / SpotVIX)*100;

Code:
``````# VIX Contango / Normal Backwardation Labels

# Mobius

# Chat Room Request 12.29.2015

# 02/28/2016 - AlphaInvestor - added color coded contango / backwardation label

# 02/28/2016 - AlphaInvestor - converted from Oil to VIX

# 12/01/2019 - AI - changed to 2 year option string

def Month = GetMonth();

def Year = GetYear();

#def Year_Ext = Year - 2010;

def Year_Ext = Year - 2000;  # AI - Fix year for new symbol logic

def agg = AggregationPeriod.DAY;

def NextContract = if Month == 1

then close(symbol = "/VXJ" + Year_Ext, period = agg)

else if Month == 2

then close(symbol = "/VXK" + Year_Ext, period = agg)

else if Month == 3

then close(symbol = "/VXM" + Year_Ext, period = agg)

else if Month == 4

then close(symbol = "/VXN" + Year_Ext, period = agg)

else if Month == 5

then close(symbol = "/VXQ" + Year_Ext, period = agg)

else if Month == 6

then close(symbol = "/VXU" + Year_Ext, period = agg)

else if Month == 7

then close(symbol = "/VXV" + Year_Ext, period = agg)

else if Month == 8

then close(symbol = "/VXX" + Year_Ext, period = agg)

else if Month == 9

then close(symbol = "/VXZ" + Year_Ext, period = agg)

else if Month == 10

then close(symbol = "/VXF" + (Year_Ext + 1), period = agg)

else if Month == 11

then close(symbol = "/VXG" + (Year_Ext + 1), period = agg)

else if Month == 12

then close(symbol = "/VXH" + (Year_Ext + 1), period = agg)

else Double.NaN;

def Month6Contract = if Month == 1

then close(symbol = "/VXQ" + Year_Ext, period = agg)

else if Month == 2

then close(symbol = "/VXU" + Year_Ext, period = agg)

else if Month == 3

then close(symbol = "/VXV" + Year_Ext, period = agg)

else if Month == 4

then close(symbol = "/VXX" + Year_Ext, period = agg)

else if Month == 5

then close(symbol = "/VXZ" + Year_Ext, period = agg)

else if Month == 6

then close(symbol = "/VXF" + (Year_Ext + 1), period = agg)

else if Month == 7

then close(symbol = "/VXG" + (Year_Ext + 1), period = agg)

else if Month == 8

then close(symbol = "/VXH" + (Year_Ext + 1), period = agg)

else if Month == 9

then close(symbol = "/VXJ" + (Year_Ext + 1), period = agg)

else if Month == 10

then close(symbol = "/VXK" + (Year_Ext + 1), period = agg)

else if Month == 11

then close(symbol = "/VXM" + (Year_Ext + 1), period = agg)

else if Month == 12

then close(symbol = "/VXN" + (Year_Ext + 1), period = agg)

else Double.NaN;

def YearOutContract = if Month == 1

then close(symbol = "/VXF" + (Year_Ext + 1), period = agg)

else if Month == 2

then close(symbol = "/VXG" + (Year_Ext + 1), period = agg)

else if Month == 3

then close(symbol = "/VXH" + (Year_Ext + 1), period = agg)

else if Month == 4

then close(symbol = "/VXJ" + (Year_Ext + 1), period = agg)

else if Month == 5

then close(symbol = "/VXK" + (Year_Ext + 1), period = agg)

else if Month == 6

then close(symbol = "/VXM" + (Year_Ext + 1), period = agg)

else if Month == 7

then close(symbol = "/VXN" + (Year_Ext + 1), period = agg)

else if Month == 8

then close(symbol = "/VXQ" + (Year_Ext + 1), period = agg)

else if Month == 9

then close(symbol = "/VXU" + (Year_Ext + 1), period = agg)

else if Month == 10

then close(symbol = "/VXV" + (Year_Ext + 1), period = agg)

else if Month == 11

then close(symbol = "/VXX" + (Year_Ext + 1), period = agg)

else if Month == 12

then close(symbol = "/VXZ" + (Year_Ext + 1), period = agg)

else Double.NaN;

AddLabel(1, "Date: " + Month +

"/" +

AsPrice(Year) +

"  Current Contract: " +

"/VX" +

"  Curr Cont Price = " +

AsDollars(close("/VX")) +

"  Next Month Contract Price = " +

AsDollars(NextContract) +

"  6 Months Out = " +

AsDollars(Month6Contract) +

"  One Year Out = " +

AsDollars(YearOutContract), Color.WHITE);

and NextContract <= Month6Contract, " /VX Typical ", Color.GREEN);

AddLabel(close("/VX") > NextContract, " /VX Front Month Inverted ", Color.RED);

AddLabel(NextContract > Month6Contract, " /VX Back Month Inverted ", Color.RED);

# End Code VIX Contango/Normal Backwardation``````

Last edited:

#### randomx

##### New member
@reknirt theres no percent of contango, because contango is contango, its like saying its in order or not in order, theres no percent of the order, its either true or false, theres no percent of true or false, its in order or its not. however theres percent of the difference from the spot and the futures .

1. what he meant was the differential between the 2nd month and the 1st month of the vix term structure expressed in percentage. that's the contango percentage that he was referring to. how much different, in percentage terms, is the 2nd month and the 1st month.
contango % = [ ( m2 / m1 ) – 1 ] * 100

2. however, the formula he presented was for the roll yield which is the differential between the spot vix and the 1st month of the vix futures.
roll yield % = [ ( m1 / spot vix) – 1 ] * 100

i hope this helps whoever is searching the topic. the information is relevant regardless of the status of the original member asking this question

Last edited:

#### MerryDay

Staff member
Staff
VIP
1. what he meant was the differential between the 2nd month and the 1st month of the vix term structure expressed in percentage. that's the contango percentage that he was referring to. how much different, in percentage terms, is the 2nd month and the 1st month.
contango % = [ ( m2 / m1 ) – 1 ] * 100

2. however, the formula he presented was for the roll yield which is the differential between the spot vix and the 1st month of the vix futures.
roll yield % = [ ( m1 / spot vix) – 1 ] * 100

i hope this helps
Did you know that clicking on a member's avatar will allow you to see when a member was last seen on the uTS forum? @XeoNoX has not been seen in a while.

#### Sascha_R

##### New member
I tried to amend the above script to work on all future symbols dynamically. When I use getsymbol(0 function for example for /CL, it will return /CL:XNYM. Therefore, I can't use Getsymbol() + Month of Expiration to refer to the term structure.

Any idea to adjust the script in such a way that it works for all future symbols?

#### randomx

##### New member
I tried to amend the above script to work on all future symbols dynamically. When I use getsymbol(0 function for example for /CL, it will return /CL:XNYM. Therefore, I can't use Getsymbol() + Month of Expiration to refer to the term structure.

Any idea to adjust the script in such a way that it works for all future symbols?
all futures symbols seems a bit greedy. there's quite a few symbols out there in the futures universe. you need to narrow it down to your target symbol

#### Sascha_R

##### New member
all futures symbols seems a bit greedy. there's quite a few symbols out there in the futures universe. you need to narrow it down to your target symbol
I was able to do it for Gold (/GC) and Oil (/CL). I understood that I have to do it manually for each symbol by using input variable for each symbol. Another question is how I can get a counter for the number of days since the term structure has flipped from contango to backwardation and vice versa?

input oil = "/CL:XNYM";
input gold = "/GC:XCEC";

def test_oil = if getsymbol()==oil then 1 else 0;

def test_gold = if getsymbol()==gold then 1 else 0;

def Month = GetMonth();

def Year = GetYear();

#def Year_Ext = Year - 2010;

def Year_Ext = Year - 2000; # AI - Fix year for new symbol logic

def agg = AggregationPeriod.DAY;

def NextContract = if Month == 1

then close(symbol = if test_oil then "/CL" +"J"+Year_Ext else "/GC"+"J"+Year_Ext, period = agg)

else if Month == 2

then close(symbol = if test_oil then "/CL" +"K"+Year_Ext else "/GC"+"K"+Year_Ext, period = agg)

else if Month == 3

then close(symbol = if test_oil then "/CL" +"M"+Year_Ext else "/GC"+"M"+Year_Ext, period = agg)

else if Month == 4

then close(symbol = if test_oil then "/CL" +"N"+Year_Ext else "/GC"+"N"+Year_Ext, period = agg)

else if Month == 5

then close(symbol = if test_oil then "/CL" +"Q"+Year_Ext else "/GC"+"Q"+Year_Ext, period = agg)

else if Month == 6

then close(symbol = if test_oil then "/CL" +"U"+Year_Ext else "/GC"+"U"+Year_Ext, period = agg)

else if Month == 7

then close(symbol = if test_oil then "/CL" +"V"+Year_Ext else "/GC"+"V"+Year_Ext, period = agg)

else if Month == 8

then close(symbol = if test_oil then "/CL" +"X"+Year_Ext else "/GC"+"X"+Year_Ext, period = agg)

else if Month == 9

then close(symbol = if test_oil then "/CL" +"Z"+Year_Ext else "/GC"+"Z"+Year_Ext, period = agg)

else if Month == 10

then close(symbol = if test_oil then "/CL" +"F"+(Year_Ext+1) else "/GC"+"F"+(Year_Ext+1), period = agg)

else if Month == 11

then close(symbol = if test_oil then "/CL" +"G"+(Year_Ext+1) else "/GC"+"G"+(Year_Ext+1), period = agg)

else if Month == 12

then close(symbol = if test_oil then "/CL" +"H"+(Year_Ext+1) else "/GC"+"H"+(Year_Ext+1), period = agg)

else Double.NaN;

def Month6Contract = if Month == 1

then close(symbol = if test_oil then "/CL" +"Q"+Year_Ext else "/GC"+"Q"+Year_Ext, period = agg)

else if Month == 2

then close(symbol = if test_oil then "/CL" +"U"+Year_Ext else "/GC"+"U"+Year_Ext, period = agg)

else if Month == 3

then close(symbol = if test_oil then "/CL" +"V"+Year_Ext else "/GC"+"V"+Year_Ext, period = agg)

else if Month == 4

then close(symbol = if test_oil then "/CL" +"X"+Year_Ext else "/GC"+"x"+Year_Ext, period = agg)

else if Month == 5

then close(symbol = if test_oil then "/CL" +"Z"+Year_Ext else "/GC"+"Z"+Year_Ext, period = agg)

else if Month == 6

then close(symbol = if test_oil then "/CL" +"F"+(Year_Ext+1) else "/GC"+"F"+(Year_Ext+1), period = agg)

else if Month == 7

then close(symbol = if test_oil then "/CL" +"G"+(Year_Ext+1) else "/GC"+"G"+(Year_Ext+1), period = agg)

else if Month == 8

then close(symbol = if test_oil then "/CL" +"H"+(Year_Ext+1) else "/GC"+"H"+(Year_Ext+1), period = agg)

else if Month == 9

then close(symbol = if test_oil then "/CL" +"J"+(Year_Ext+1) else "/GC"+"J"+(Year_Ext+1), period = agg)

else if Month == 10

then close(symbol = if test_oil then "/CL" +"K"+(Year_Ext+1) else "/GC"+"K"+(Year_Ext+1), period = agg)

else if Month == 11

then close(symbol = if test_oil then "/CL" +"M"+(Year_Ext+1) else "/GC"+"M"+(Year_Ext+1), period = agg)

else if Month == 12

then close(symbol = if test_oil then "/CL" +"N"+(Year_Ext+1) else "/GC"+"N"+(Year_Ext+1), period = agg)

else Double.NaN;

def YearOutContract = if Month == 1

then close(symbol = if test_oil then "/CL" +"F"+(Year_Ext+1) else "/GC"+"F"+(Year_Ext+1), period = agg)

else if Month == 2

then close(symbol = if test_oil then "/CL" +"G"+(Year_Ext+1) else "/GC"+"G"+(Year_Ext+1), period = agg)

else if Month == 3

then close(symbol = if test_oil then "/CL" +"H"+(Year_Ext+1) else "/GC"+"H"+(Year_Ext+1), period = agg)

else if Month == 4

then close(symbol =if test_oil then "/CL" +"J"+(Year_Ext+1) else "/GC"+"J"+(Year_Ext+1), period = agg)

else if Month == 5

then close(symbol = if test_oil then "/CL" +"K"+(Year_Ext+1) else "/GC"+"K"+(Year_Ext+1), period = agg)

else if Month == 6

then close(symbol =if test_oil then "/CL" +"M"+(Year_Ext+1) else "/GC"+"M"+(Year_Ext+1), period = agg)

else if Month == 7

then close(symbol =if test_oil then "/CL" +"N"+(Year_Ext+1) else "/GC"+"N"+(Year_Ext+1), period = agg)

else if Month == 8

then close(symbol = if test_oil then "/CL" +"Q"+(Year_Ext+1) else "/GC"+"Q"+(Year_Ext+1), period = agg)

else if Month == 9

then close(symbol = if test_oil then "/CL" +"U"+(Year_Ext+1) else "/GC"+"U"+(Year_Ext+1), period = agg)

else if Month == 10

then close(symbol = if test_oil then "/CL" +"V"+(Year_Ext+1) else "/GC"+"V"+(Year_Ext+1), period = agg)

else if Month == 11

then close(symbol = if test_oil then "/CL" +"X"+(Year_Ext+1) else "/GC"+"X"+(Year_Ext+1), period = agg)

else if Month == 12

then close(symbol = if test_oil then "/CL" +"Z"+(Year_Ext+1) else "/GC"+"Z"+(Year_Ext+1), period = agg)

else Double.NaN;

AddLabel(close(GetSymbol()) <= NextContract, "Front Month: " + AsDollars(NextContract) + "/ 6 Months: " + AsDollars(Month6Contract) + "/ Contango", Color.RED);

AddLabel(close(GetSymbol()) > NextContract, "Front Month: " + AsDollars(NextContract) + "/ 6 Months: " + AsDollars(Month6Contract) + "/ Backwardation", Color.GREEN);

#### UT2Pro1689

##### Member
@reknirt
Thanks for the code.

I've modified it to create the vix inversion curve as described in the following article. Any comments are welcome.

### VIX Curve Inverts in Time-Honored Bull Signal Tied to Peak Panic​

"As the S&P 500 suffered its worst week since October 2020, traders are paying up for near-term protection. The Cboe Volatility Index, a gauge of option costs, has surged 7 points to 26 over the span, pushing its spot price above that of its three-month futures for the first time in more than a month.
Such an inverted curve has occurred four other times in the past year and all coincided with market bottoms. "

Code:
``````# SMO_VIXInversion.ts
# Version 1.0, 01-23-2022
# Modified from

# Futures 3 months away
def monBack  = 13 - monAhead;

def month = GetMonth();
def whichMonth = if month < monBack then month + monAhead else month - monBack - 1;

def Year = GetYear();
def Year_Ext = Year - 2000;
def agg = AggregationPeriod.day;

def SpotVIX = close("VIX");
def NearContract = if whichMonth == 1
then Close(symbol = "/VXF" + Year_Ext, period = agg)
else if whichMonth == 2
then Close(symbol = "/VXG" + Year_Ext, period = agg)
else if whichMonth == 3
then Close(symbol = "/VXH" + Year_Ext, period = agg)
else if whichMonth == 4
then Close(symbol = "/VXJ" + Year_Ext, period = agg)
else if whichMonth == 5
then Close(symbol = "/VXK" + Year_Ext, period = agg)
else if whichMonth == 6
then Close(symbol = "/VXM" + Year_Ext, period = agg)
else if whichMonth == 7
then Close(symbol = "/VXN" + Year_Ext, period = agg)
else if whichMonth == 8
then Close(symbol = "/VXQ" + Year_Ext, period = agg)
else if whichMonth == 9
then Close(symbol = "/VXU" + Year_Ext, period = agg)
else if whichMonth == 10
then Close(symbol = "/VXV" + Year_Ext, period = agg)
else if whichMonth == 11
then Close(symbol = "/VXX" + Year_Ext, period = agg)
else if whichMonth == 12
then Close(symbol = "/VXZ" + Year_Ext, period = agg)
else double.nan;

# if the calculations on any of the bar return NaN, use the previous bar.
def spotFiltered = if IsNaN(spotVIX) then  spotFiltered[1]  else SpotVIX;
def nearFiltered = if IsNaN(NearContract) then  nearFiltered[1]  else NearContract;

# may use MA to smooth curve
#plot contangoPercent = simpleMovingAvg((-nearFiltered + spotFiltered) / spotFiltered, 4, 0);
plot vixInversion = (-nearFiltered + spotFiltered);
plot zeroLine = 0;

# End Code VIX Inversion/Backwardation``````

#### armdav

##### New member
@reknirt
Thanks for the code.

I've modified it to create the vix inversion curve as described in the following article. Any comments are welcome.

### VIX Curve Inverts in Time-Honored Bull Signal Tied to Peak Panic​

"As the S&P 500 suffered its worst week since October 2020, traders are paying up for near-term protection. The Cboe Volatility Index, a gauge of option costs, has surged 7 points to 26 over the span, pushing its spot price above that of its three-month futures for the first time in more than a month.
Such an inverted curve has occurred four other times in the past year and all coincided with market bottoms. "

Code:
``````# SMO_VIXInversion.ts
# Version 1.0, 01-23-2022
# Modified from

# Futures 3 months away
def monBack  = 13 - monAhead;

def month = GetMonth();
def whichMonth = if month < monBack then month + monAhead else month - monBack - 1;

def Year = GetYear();
def Year_Ext = Year - 2000;
def agg = AggregationPeriod.day;

def SpotVIX = close("VIX");
def NearContract = if whichMonth == 1
then Close(symbol = "/VXF" + Year_Ext, period = agg)
else if whichMonth == 2
then Close(symbol = "/VXG" + Year_Ext, period = agg)
else if whichMonth == 3
then Close(symbol = "/VXH" + Year_Ext, period = agg)
else if whichMonth == 4
then Close(symbol = "/VXJ" + Year_Ext, period = agg)
else if whichMonth == 5
then Close(symbol = "/VXK" + Year_Ext, period = agg)
else if whichMonth == 6
then Close(symbol = "/VXM" + Year_Ext, period = agg)
else if whichMonth == 7
then Close(symbol = "/VXN" + Year_Ext, period = agg)
else if whichMonth == 8
then Close(symbol = "/VXQ" + Year_Ext, period = agg)
else if whichMonth == 9
then Close(symbol = "/VXU" + Year_Ext, period = agg)
else if whichMonth == 10
then Close(symbol = "/VXV" + Year_Ext, period = agg)
else if whichMonth == 11
then Close(symbol = "/VXX" + Year_Ext, period = agg)
else if whichMonth == 12
then Close(symbol = "/VXZ" + Year_Ext, period = agg)
else double.nan;

# if the calculations on any of the bar return NaN, use the previous bar.
def spotFiltered = if IsNaN(spotVIX) then  spotFiltered[1]  else SpotVIX;
def nearFiltered = if IsNaN(NearContract) then  nearFiltered[1]  else NearContract;

# may use MA to smooth curve
#plot contangoPercent = simpleMovingAvg((-nearFiltered + spotFiltered) / spotFiltered, 4, 0);
plot vixInversion = (-nearFiltered + spotFiltered);
plot zeroLine = 0;

# End Code VIX Inversion/Backwardation``````
do I need to change the def Year_Ext = Year - 2000; line to def Year_Ext = Year - 2022;?
I was just playing with this indicator and noticed when you change the year, the results are different

#### UT2Pro1689

##### Member
do I need to change the def Year_Ext = Year - 2000; line to def Year_Ext = Year - 2022;?
I was just playing with this indicator and noticed when you change the year, the results are different
The variable Year_Ext is used for futures symbols, which include digits like 22 for year 2022 and 21 for year 2021. So I believe we have to use 2000.

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