If you mean Friday, there was no entry as 966.5 was never reached. If you're talking hypothetically, though, the trade would have been entered at 966.5.
As for today, no, I wouldn't (and didn't) take a quick gain. You can make this into a scalping strategy, but that's not its purpose. The goal is to reach the day's target, which we didn't come close to doing, partly because of the size of the opening gap. Once it reaches the day's target, there are a variety of exit strategies you can employ, but if it doesn't reach the day's target, then you just leave the stop at breakeven. If nothing happens by the close, just exit then. Or you can move your stop to the last reaction high, if short. Today, of course, none of that applied since price dropped only five points below the entry.
As for your second question, if you get stopped out, the highest point up to that time becomes the new high, and re-entry is made two points above that. This was one of Mike's rules and I've found it to be a good one. Without some sort of bar, you wind up chasing price.
I'm not sure what you mean by your (b) question. If you're stopped out and you never reached the day's target, you could keep trying as described in the preceding paragraph (assuming that price keeps moving in the same direction), but within three tries you're probably going to be so close to target that being stopped out will be practically guaranteed.
The only other trade is a break of the other end. This never happened today. If the target had been reached, then you could look to enter the other side on a reversal depending on what sort of reversal patterns you like. I only trade Ms, Ws, and 2Bs as they seem to be the most successful. The "breakdown" at 2:40 was not a re-entry since we never reached target; therefore, no reversal was taken. When I got stopped out of the first trade, I was done for the day. But then one of the purposes of this strategy is to keep you out of a trendless market, and this was certainly trendless today.
This is not to say that this can't be modified to create a scalping strategy. But when activity dries up so quickly, I'm even more reluctant to try scalping. The gap didn't fill, so there was no opportunity there. The breakdown below the low didn't pan out, so that was breakeven. There was no reversal to play since we didn't reach target. So I spent the day arguing with inandlong.
Any other questions, feel free.
--Db