Just thought I'd post up this short term 15 minute chart of GKP as it shows the possibility of a symmetrical triangle in play and it's about the right distance into the triangle to make a good break (the best place is about 2/3rds of the way into the pattern).

The way to trade this pattern is in the direction of the breakout but be careful - triangles often have a small false breakout on the opposite side of the real break.

I'd expect to see that RSI break out of it's trendline slightly earlier than the price if it's going to break upwards but that doesn't always happen. Longs could now have tight stops below 146.25p, shorts should have stops still above 161p as that's the stronger level and is nearby.