Firstly, I call them "simple" as there are only a few aspects that need to be covered to make them work and the coding for it would be easy enough (and your suggestion for TradeStation/NinjaTrader seems sound). In reality, categorizing them after extrapolating data and qualifying them takes a lot of work. So they are only simple, only after all the work is done.
I know that they are high probability as I have traded them time and time again over a long period and they have fared well.
How do you know the coding would be easy enough if you cannot program yourself?