I am trialling (Week 2) a simple trend-following system on the 30-min charts, mostly for the Dow, otherwise GBP/USD.
The r:r I am using is 1:1.5, I add a second trade when gain = +0.5r, a third at +1.0r and as Trade 1 is closing at +1.5r, Trade 4 is opening. And so on, until the trend weakens...