Quote from Johnny Rotten:
STOP-LOSSES:
Trail behind a recent pivot low when long, OR a recent strong up bar (open at bottom, close at top, range good), OR $200. Move it behind each strong up bar. Stop-loss placement is quite discretionary. But never initially risk more than you aim for. On occasion you may decide to exit early if you get a strong key reversal bar..
You may already have played with this, but, if not, when faced with a substantial expansion bar (wide-range bar), consider using the "pivots" on a 1 or 2m chart to trail the stop rather than the bottom or top of that 5m bar. This may get you out too early if the move has more left in it, but you're after quick profits anyway, and this would get you out closer to the turn if it becomes a reversal.