Quality of Model 25% on back test esecution

 

Hi staff, today I downloads a new history files on EURUSD from Tickstory. I stored these files in my directory G:.../EURUSD. That directory have a subdirectory FXx. Afther the download the files *.hst there are on my directory EURUSD and the files *.hst on my subdirectory FXT. Before import new history files in MT4 I copy the files *.FXT on the mt4 directory ...../tester/History  and after that I import the new Hoistory files in MT4. I do a backtest of my EA and  it report display "Quality of Model 25% ". what I do wrong? Can you help me please?

thanks you for all help.

Fabio Crippa