Trying to backtest intraday on 1000+ trades (big data files). Two problems. 1. On performance report "Total Net Profit" on the Summary tab very often does not equal the number at the bottom of Cummulative column in the Trades tab. Is this normal? 2. Equally I have very complex code that needs to work out simple additions of big numbers on a regular basis. Without going into mindless detail the problem I have can be boiled down to this: a = b + c; print (a,b,c); The results from the above are a = 100000, b = 2626.50, c = 102627.00. Sometimes, though, it correctly works out the SAME data as 102626.50 if you shorten the file being looked at. Anyone else have this problem with TS? Thanks