# Option Greeks Calculation Labels for ThinkorSwim

#### markos

##### Well-known member
VIP
Posted to TSL 7-23-19
11:45 jeffrey2360: Would be great to be able to grab live greeks in a study the same way we get price. HIstorical data is not that important, but having live ratio is very useful (delta/theta)
11:46 Mobius:
Code:
``````# Delta Calculation
# For Options with 1 dollar strikes
# Mobius
# V01.07.2019

input DayToExpiry = 2; #hint: Don't mess with this.
input Series_IV = 1;

def IV = SeriesVolatility(series = Series_IV);
def K = Floor(close);
def S = close;
def R = GetInterestRate();
def t = DayToExpiry / 365;
def d1 = (log(S / K) + ((R + (sqr(IV) / 2)) * t)) / (IV * sqrt(t));
script cnd

{

input data  = 1;

def a = AbsValue(data);

def b1 =  .31938153;

def b2 = -.356563782;

def b3 = 1.781477937;

def b4 = -1.821255978;

def b5 = 1.330274429;

def b6 =  .2316419;

def e = 1 / (1 + b6 * a);

def i = 1 - 1 / Sqrt(2 * Double.Pi) * Exp(-Power(a, 2) / 2) *

(b1 * e + b2 * e * e + b3 * Power(e, 3) + b4 * Power(e, 4) + b5 * Power(e, 5));

plot CND = if data < 0

then 1 - i

else i;

}

def Delta = cnd(d1);
AddLabel(1, "Delta Est = " + Delta, color.white);
# End Code Delta Estimate``````

11:47 Mobius: That is pretty bloody close
11:47 Mobius: usually within a penny
11:48 jeffrey2360: Oh. I got to study that code. Will it be possible to apply this to 4 options in a single study ?
11:50 Mobius: sure. You'll need to run 4 instances of the study, change the ones for puts from the above which is for calls and alter the other strikes.
11:52 Mobius: And it would help to have a degree in mathematics and coding but you can probably do it. Maybe

Last edited:
Posted today on thinkScript Lounge - gift from Mobius.

Code:
``````# Greeks Calculations (originally just Delta)
# For Options
# Mobius
# V02.07.2019
# K - Option strike price
# N - Standard normal cumulative distribution function
# r - Risk free interest rate
# IV - Volatility of the underlying
# S - Price of the underlying
# t - Time to option's expiry
# Delta = N(d1)
#           d1 = (ln(S/K) + (r + (sqr(IV)/2))t) / (? (sqrt(t)))
# Gamma  = (d2) / S(IV(sqrt(t)))
# d2 =  e -(sqr(d1) / 2) / sqrt(2*pi)
# Theta = ((S d2))IV) / 2 sqrt(t)) - (rK e(rt)N(d4))
#         where phi(d3) = (exp(-(sqr(x)/2))) / (2 * sqrt(t))
#         where d4 = d1 - IV(sqrt(t))
# Vega = S phi(d1) Sqrt(t)

input DayToExpiry = 1;
input Series_IV = 1;

def IV = SeriesVolatility(series = Series_IV);
def K = if close >= Round(close / Strike_Spread, 0) * Strike_Spread
def S = close;
def r = GetInterestRate();
def t = DayToExpiry / 365;
def d1 = (Log(S / K) + ((r + (Sqr(IV) / 2)) * t)) / (IV * Sqrt(t));
addLabel(1, "Strike: " + AsDollars(K), color.white);
script N
{
input data  = 1;
def a = AbsValue(data);
def b1 =  .31938153;
def b2 = -.356563782;
def b3 = 1.781477937;
def b4 = -1.821255978;
def b5 = 1.330274429;
def b6 =  .2316419;
def e = 1 / (1 + b6 * a);
def i = 1 - 1 / Sqrt(2 * Double.Pi) * Exp(-Power(a, 2) / 2) *
(b1 * e + b2 * e * e + b3 *
Power(e, 3) + b4 * Power(e, 4) + b5 * Power(e, 5));
plot CND = if data < 0
then 1 - i
else i;
}
def Delta = N(d1);
AddLabel(1, "Delta = " + Delta, Color.WHITE);
# End Code Delta
# Gamma
def d2 = Exp(-(Sqr(d1) / 2)) / Sqrt(2 * Double.Pi);
def Gamma = d2 / (S * (IV * Sqrt(t)));
AddLabel(1, "Gamma = " + Gamma, Color.WHITE);
# End Code Gamma
# Theta
def Theta = -(-(S*d2*IV*(.5000)/
(2*sqrt(t)))-
(r*(exp(-r*t)*K))*N(d2)+(S*N(d1)*(.5000)))/365;
# (.5000) variant less than .5 e(X/t)
AddLabel(1, "Theta = " + theta, Color.WHITE);
# End Code Theta
# Vega
def Vega = (S*d2*sqrt(t))/100;
AddLabel(1, "Vega = " + Vega, color.white);
# End Code Greeks``````

Thanks @mc01439 ! Mobius is handing out Thanksgiving Black Friday Deals (as he called it) early. Very nice.

Posted today on thinkScript Lounge - gift from Mobius.

Code:
``````# Greeks Calculations (originally just Delta)
# For Options
# Mobius
# V02.07.2019
# K - Option strike price
# N - Standard normal cumulative distribution function
# r - Risk free interest rate
# IV - Volatility of the underlying
# S - Price of the underlying
# t - Time to option's expiry
# Delta = N(d1)
#           d1 = (ln(S/K) + (r + (sqr(IV)/2))t) / (? (sqrt(t)))
# Gamma  = (d2) / S(IV(sqrt(t)))
# d2 =  e -(sqr(d1) / 2) / sqrt(2*pi)
# Theta = ((S d2))IV) / 2 sqrt(t)) - (rK e(rt)N(d4))
#         where phi(d3) = (exp(-(sqr(x)/2))) / (2 * sqrt(t))
#         where d4 = d1 - IV(sqrt(t))
# Vega = S phi(d1) Sqrt(t)

input DayToExpiry = 1;
input Series_IV = 1;

def IV = SeriesVolatility(series = Series_IV);
def K = if close >= Round(close / Strike_Spread, 0) * Strike_Spread
def S = close;
def r = GetInterestRate();
def t = DayToExpiry / 365;
def d1 = (Log(S / K) + ((r + (Sqr(IV) / 2)) * t)) / (IV * Sqrt(t));
addLabel(1, "Strike: " + AsDollars(K), color.white);
script N
{
input data  = 1;
def a = AbsValue(data);
def b1 =  .31938153;
def b2 = -.356563782;
def b3 = 1.781477937;
def b4 = -1.821255978;
def b5 = 1.330274429;
def b6 =  .2316419;
def e = 1 / (1 + b6 * a);
def i = 1 - 1 / Sqrt(2 * Double.Pi) * Exp(-Power(a, 2) / 2) *
(b1 * e + b2 * e * e + b3 *
Power(e, 3) + b4 * Power(e, 4) + b5 * Power(e, 5));
plot CND = if data < 0
then 1 - i
else i;
}
def Delta = N(d1);
AddLabel(1, "Delta = " + Delta, Color.WHITE);
# End Code Delta
# Gamma
def d2 = Exp(-(Sqr(d1) / 2)) / Sqrt(2 * Double.Pi);
def Gamma = d2 / (S * (IV * Sqrt(t)));
AddLabel(1, "Gamma = " + Gamma, Color.WHITE);
# End Code Gamma
# Theta
def Theta = -(-(S*d2*IV*(.5000)/
(2*sqrt(t)))-
(r*(exp(-r*t)*K))*N(d2)+(S*N(d1)*(.5000)))/365;
# (.5000) variant less than .5 e(X/t)
AddLabel(1, "Theta = " + theta, Color.WHITE);
# End Code Theta
# Vega
def Vega = (S*d2*sqrt(t))/100;
AddLabel(1, "Vega = " + Vega, color.white);
# End Code Greeks``````
Great Coding, very accurate !
I'm a new member to the community and was wondering if there was any way to code
the Greeks for out of the money options.
Mainly trade SPX Broken Wing Butterflies & Iron Condors for Income.

Scripting the Greeks for the OTM options and estimating the price for a particular strike
would enable me to use in formulas provided by the book "Option Strategy, Risk/Return
Ratios" by Brian Johnson. The Author uses an Excel Spreadsheet but doesn't provide
the coding.
Any help would be greatly appreciated .
Many Thanks , HPC

Great Coding, very accurate !
I'm a new member to the community and was wondering if there was any way to code
the Greeks for out of the money options.
Mainly trade SPX Broken Wing Butterflies & Iron Condors for Income.

Scripting the Greeks for the OTM options and estimating the price for a particular strike
would enable me to use in formulas provided by the book "Option Strategy, Risk/Return
Ratios" by Brian Johnson. The Author uses an Excel Spreadsheet but doesn't provide
the coding.
Any help would be greatly appreciated .
Many Thanks , HPC
Don't we have all greeks updated real time in Think or Swim for all options?

@mc01439 @H.P.C. I have trying to use # Greeks Calculations (originally just Delta) for Options by Mobius V02.07.2019 but getting N/A for all greeks in TOS SPX option chart. You guys have been using this on SPX or SPX options chart? If SPX options chart then how far are you choosing expiration?

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