ADL accumulation distribution: big differences depending on platform!

[ch9090]

Dear all,

Today I've backtested the same strategy with 4 different software and I've realized that the ADL indicator provides very different figures!

I am using daily data and I've e.g. -65M, -18M, -30M and -3M on the same day for the same stock!

Same thing for the chaikin oscillator and the OBV (MACD and RSI numbers are identical). I could understand/accept small differences but they're so big!

These indicators are standards, how can they produce such differences? Any ideas?

Ch90

[NinjaTrader_RyanM1]

Hi Ch90,

We can't speak for other platform functionality but do provide the source code for all our system indicators. You can see the calculations for ADL by clicking Tools > Edit NinjaScript > Indicator > Select ADL and Open. There are too many factors to take into account between multiple trading platforms and not all be may apparent to you in an attempt to line them up. Maybe they handle divide by zero cases differently?

If you are concerned about inaccuracies in the calculation, I would review the source code and compare to commonly accepted definitions for these. Let us know if you identify any discrepancy and the source you're using for the indicator definitions.