See for yourself here, that the entire strategy is based on parabolic SAR. The minor deviance may be from a use of average true range instead of close, or some other similar source. If you want this just simply use the BUILT IN SAR function with the parameters: sar(0.015, 0.01, 0.025)
I am not sure how they are obfuscating the input to get a single integer into these three parameters, but the lesson here is: DO NOT PAY $300+ FOR THIS INDICATOR
Parabolic SAR is a very simple strategy, and the fact that Travis is obscuring the actual mechanics behind this should make you as skeptical as I was.
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