ISM data fell below 50 points and GBP went up again. Wow.. went to
Dragon Fly 
take a look just now and put a Sell/Buy stop order and came back with a whopping 79 pips gain on the buy-stop trigger.
I'm not really the person to ask because I'm also an end-user. I guess if anyone interested in learning more about Dolly should check out their main thread at Forex TSD.
Edge is right, 15-min is a good TF to gauge the momentum of the movement and once it hits the buy/sell area, and the movement is aligned with the primary trend, it usually takes off very well.