is there any way in backtesting to know the percent of total backtesting time the EA have been in the market? somthing like tradestation performance report do?
One way to figure this out is to go to strategy testers Results tab and see the average position holding time and multiply this by the number of trades then this product is divided by the backtest period. There might be simpler ways to do it but this should get the job done.
Please note that this method is not 100% accurate in every case though :(