 # Gann Angles Indicator for ThinkorSwim

#### Picard

##### Member
Here's code for Gann Angles originally coded by Mobius and modified for highs and lows by someone else. I posted this for those who already know how to use Gann's Angles. There are courses in Udemy.com, if you don't know already. Also look here: The Best Gann Fan Trading Strategy Code:
``````# Gann Angles by Mobius
# Modified
# V02.03.03.2019
#hint: The primary Gann angles: 1X2, 1X1 and 2X1.  1X1 is moving one unit of price with one unit of time. Additional angles 1X8, 1X4, 4X1 and 8X1.
def Coefficient_1 = .5;
def Coefficient_2 = 1;
def Coefficient_3 = 2;
def Coefficient_4 = .125;
def Coefficient_5 = .25;
def Coefficient_6 = 4;
def bar = BarNumber();

input numMonths = 1;
input lineWeight = 3;

def numBars     = 21 * numMonths;
def barNum       = if IsNaN( close ) then Double.NaN else BarNumber();
def endBar      = HighestAll( barNum );
def startBar    = if endBar <= numBars then 1 else endBar - numBars;

def hData       = If( barNum < startBar, Double.NaN, high );
def lData       = If( barNum < startBar, Double.NaN, low );

def peak = HighestAll(hData);

def Apex = HighestAll(hData);
def Apex_Bar = if high == Apex
then bar
else Double.NaN;

then bar
else Double.NaN;

def FirstValue = if HighestAll(Apex_Bar) == FirstBar
then Apex
else FirstValue;

def LastValue = if HighestAll(Apex_Bar) == LastBar
then Apex
else LastValue;

# Gann Line Algorithm
def x = AbsValue(HighestAll(Apex_Bar) - HighestAll(Nadir_Bar));
def slope_1 = (AbsValue(Apex - Nadir) * Coefficient_1) / x;
def slope_2 = (AbsValue(Apex - Nadir) * Coefficient_2) / x;
def slope_3 = (AbsValue(Apex - Nadir) * Coefficient_3) / x;
def slope_4 = (AbsValue(Apex - Nadir) * Coefficient_4) / x;
def slope_5 = (AbsValue(Apex - Nadir) * Coefficient_5) / x;
def slope_6 = (AbsValue(Apex - Nadir) * Coefficient_6) / x;

plot G1 = if bar >= FirstBar and HighestAll(Apex_Bar) == FirstBar
then FirstValue - (slope_1 * (bar - FirstBar))
else if bar >= FirstBar and HighestAll(Nadir_Bar) == FirstBar
then FirstValue + (slope_1 * (bar - FirstBar))
else Double.NaN;
plot G2 = if bar >= FirstBar and HighestAll(Apex_Bar) == FirstBar
then FirstValue - (slope_2 * (bar - FirstBar))
else if bar >= FirstBar and HighestAll(Nadir_Bar) == FirstBar
then FirstValue + (slope_2 * (bar - FirstBar))
else Double.NaN;
plot G3 = if bar >= FirstBar and HighestAll(Apex_Bar) == FirstBar
then FirstValue - (slope_3 * (bar - FirstBar))
else if bar >= FirstBar and HighestAll(Nadir_Bar) == FirstBar
then FirstValue + (slope_3 * (bar - FirstBar))
else Double.NaN;
plot G4 = if bar >= FirstBar and HighestAll(Apex_Bar) == FirstBar
then FirstValue - (slope_4 * (bar - FirstBar))
else if bar >= FirstBar and HighestAll(Nadir_Bar) == FirstBar
then FirstValue + (slope_4 * (bar - FirstBar))
else Double.NaN;
plot G5 = if bar >= FirstBar and HighestAll(Apex_Bar) == FirstBar
then FirstValue - (slope_5 * (bar - FirstBar))
else if bar >= FirstBar and HighestAll(Nadir_Bar) == FirstBar
then FirstValue + (slope_5 * (bar - FirstBar))
else Double.NaN;
plot G6 = if bar >= FirstBar and HighestAll(Apex_Bar) == FirstBar
then FirstValue - (slope_6 * (bar - FirstBar))
else if bar >= FirstBar and HighestAll(Nadir_Bar) == FirstBar
then FirstValue + (slope_6 * (bar - FirstBar))
else Double.NaN;
# End Code Gann Angles``````

The following is from the thinkScript Lounge:

I'm attempting to develop a custom quote column for the Gann Angle so that I can watch the rate of increase or decrease of prices in a gap as a quick reference to selecting a stock to gap trade. There's no errors in the code; however, I'd appreciate any feedback or ideas on this. I've updated my Gann Angle code so that all time units are in seconds. So hopefully this should be working correctly; however, I'm not sure about the units of the angles. Are they in radians or in decimal degrees?

Code:
``````script cq_gannangle {
# CQ_GannAngle

def StartOfDay = 0000;
def OpeningTime = 0930;

# Time Values
def CurrentTime = secondsFromTime(StartOfDay);

# Price Values
def CurrentPrice = hl2;
def OpeningPrice = open(period = "DAY"); # Today's Opening Price

plot GannAngle = (CurrentPrice - OpeningPrice)/(CurrentTime -StartOfTrading);
}
# CQ_GannAngleCOLUMN
def _GannAngle = CQ_GannAngle().GannAngle;
plot GannAngle = roundUp((Atan(_GannAngle) * 180 / Double.Pi),2);#This is in degrees``````

Last edited:

#### TonXas

##### New member
Any way to modify this to draw a -45 degree angle from the HOD and a 45 degree angle from the LOD?

#### cswu1211

##### Member
VIP
@Picard How to "explain" the GANN angles straight lines were distorted/bended with TSLA • germanburrito

#### cswu1211

VIP

##### New member
@cswu1211 Are you using a log price scale for your charts? Just a guess why the lines are slightly curved.

#### cswu1211

##### Member
VIP
@cswu1211 Are you using a log price scale for your charts? Just a guess why the lines are slightly curved.
NO, I use the regular ones. some other stocks show the straight Gann lines, except for this (TSLA) one. I just wondering why?! Might happen for other stocks or timeframe?!

#### ext99k

##### Member
How does this determine where the fan begins?

#### halcyonguy

##### Active member
VIP
How does this determine where the fan begins?
Ruby:
``````# fan starting point ?
#   find the highest high and lowest low.
#   then determine which one occurred first.

# highest price level of high
def Apex = HighestAll(hData);

# if current bar is the highest high, then set the barnumber
def Apex_Bar = if high == Apex
then bar
else Double.NaN;

# lowest price level of low

# if current bar is the lowest low, then set the barnumber
then bar
else Double.NaN;

# use highestall() to get the barnumbers for highest high and lowest low.
#   only 1 bar for each variable (Apex_Bar, Nadir_Bar) will have a number.
#   the other bars will be double.nan, so ignored by highestall()
# use min() to determine which one came first, which one has a lower barnumber