If he halved his stop at 2R it would still be at 1 ATR below entry and he would be giving back 2.5R when that stop is hit.
Did you even read my ****ing post? tightening, trailing stops.
Yeah I have manually back tested 2 x ATR stops at buy, 1 x ATR stop at 3R and then .5ATR stop at 4R. 1xATR works pretty well, it does not really trim my wins by too much, but the .5ATR stop definitely does.
Another thing I was looking into, because I always sell on the open, sometimes I miss great instraday opportunities. Putting a conditional sell in at 5R at open from the onset has interesting results...expectancy drops a tini bit, but expectancy PER DAY rises by quite a bit.
Try testing out some different values for your own system to see what works best, are you manually back testing or amibrokering it?