From Andrew Owens (not me, Laura Owens):

Hi,

I agree that if the paper trading platform kept track of the P/L over time they would understand the consequences of losing trades and that would be beneficial.

Most platforms that I have experienced take your profit and loss back to zero the following day. This allows traders to focus on their winners. I have been in numerous trading rooms where the traders killed it paper trading and then lose in live trading because in the paper trading, they had no emotions and capital in their trades.