[Foxford]

In a backtest appeared : For October 2006 the total result for Eur/Usd was 123 pips with 16 days 1 trade per day.

The original strategy advises just a stop of 35 pips. However, you can also combine it with other indicators to exit when it goes the other way. Then you don't have to wait 35 pips. Usually you get into the market with a strong up or down thrust. It is then, that the system has to make its 20 pips. If this does not work out, you might better stop the trade instead of awaiting the full stop of 35 pips.