I backtested this ea on 30m EURUSD. For the last 20 weeks it gives +96p/week.
For week -30 to week -20 it gives -110p/week.
So we need some Filter (indicator or rule) to work this out.

I use a TS of 110p, the smaller the TS, the smaller the profit/losses...

BTW, if you set back the (buy)entry to CloseOfWeek if (sell)order was performed as you suggested, it reduces the profit and losses to 50%.

Thank you,

BigBoppa