Diver, thanks for your reply. In response, I hope I can answer Bonobo's question purely from a theoretical standpoint ie if GKP follows EWT then the answer to Bonobo's question automatically emerges.
Most impulse waves have one extended subwave. This is most commonly the 3rd, sometimes the 5th and almost never the 1st. To that end we can denote the 1st subwave of an impulse to have unit length. In GKP's case (if we are assuming that it is in an impulse as opposed to a corrective wave), this 1st wave was from 161p to 187.7p. That's 26.7p obviously.
Let's also assume that the move up from 172p was/is the 3rd wave and that it's extended per the norm (after all, it did retrace almost exactly the "correct" amount of 61.8% for a wave 2). An extended wave is, in fact, normally 161.8% of the unit (1st) wave, not the 261.8% figure you've used according to EWT. I won't go into the maths here but that is definitely what EWT says about the theoretical length of an extended wave.
So, wave 3 ought to be 161.8% of 26.7p which is 43.2p. Add this to the assumed wave 2 low and we get 215.2p. This is uncannily close to the natural resistance at 217p which was a nice coincidence. In reality it's hit 220p and then dropped back to close below the 161.8% Fib.
Again, if we assume 220p to have been the real top of wave 3 then we'd expect a 38.2% retrace theoretically. This would take us to 220-(220-172)x0.382 which is 201.7p. That's the theoretical level for a wave 4 assuming that this series is impulsive. 203/4p is pretty close to this is it not?
Further, EWT suggests that if the 3rd wave is extended then the 5th is likely to be no more than equal to the 1st wave. Let's assume it's exactly equal at 26.7p. We add this to the theoretical wave 4 low of 201.7p and we get 228.4p for the wave 5 target. Remarkably close to the gap resistance at 230p, no?
So, I'd favour a drop back to that key area (in fact a backtest of the breakout from 204p would be sufficient for me) before rising to fill the gap. That would complete 5 waves up and the 1st wave up of a larger degree series.
And what do we expect after a 1st wave up? The theoretical norm would be a 61.8% retrace and guess where that would take it? You've guessed it...a backtest of the breakout from 187p.
Of course, it's very dangerous to assume that theory will play out and we should always trade what we see in front of us but it is quite uncanny how theory so often fits with natural supports and resistances. I didn't call 161p as the low but I did state it as an important support level. Despite what some may say, theoretically until there's a retrace which stays above 200p followed by a new high above 220p there's still a possibility that this whole sequence from 161p is corrective rather than impulsive.
I will not be assuming that the theory above will play out. I will bear it in mind but you never know. Here are some of the Fib sequences I've discussed on a chart. They're colour coded so you know which Fib lines belong to which sequences:
dl.dropbox.com/u/20815047/GKPdaily12_01_13.gif