PSAR values are coming wrong.
I have tried in Data Source - Cnx Nifty, Periodicty - Day, Bar Interval - 1, Bar History - 25000.
e.g: Aug 12 is sell with psar indicator but pi backtest results showing Aug 11 as sell.
Check the below sysntax for PSAR and verify values
PSAR(0.02, 0.2)
and update the pi if not done.