I've been letting my automated system trade on its own with no intervention for about 2 months. 99 trades for me to research and improve the system. I have all the trades imported into excel. I have for each trade: date, time, which specific algo hit, the prices traded at, the resultant P/L. I am sorting according to P/L lowest at top and now running those days data through my system with a visual of all the chart and indicators I have been using. I check out why this was such a loss and postulate what I might be able to do to fix the issue without negatively affected the good trades that I may have in the future.