Even if just illustrating what has not worked, backtesting has meaning. But after hundreds of thousands of tests, and then managing money using various systems, it is possible to profit real time, based on backtesting. You must be aware of many of the quants that have made multi-millions, over many years.
Are you using optimizable psrameters??? If so,WFA is 9n order.. If not,shift your parameters and see what the results are vs your initial backtest
Yer not the only one today. Seems to be a new trend. People need to get the heck off their "smartphones" and use PCs instead, heh.