Please when backtesting the demo in Metatrader 5,   some platforms has bad historic data, mql metatrader 5 data show no prices from 24/01/18 to 19/02/18, and a huge drop equity from  108.397  to 100.000 again.

Obviously this lack of data and returning to the original equity is a reset on the backtesting and a data error.

It is better use good data to backtest as Dukascopy or Darwinex from 2017/10/02 .

This is the Demo expert results in darwinex metatrader 5. Be sure you test using good data.