XRP extending it's run, but for how long?

Ripple has run quite a bit. We are seeing a very overextended MACD on the 4h, extremely high volume on a breakout-> selloff, and retest of the recent high. I am accumulating this coin, so I will look for buys near the 50 and 200 period MA pullbacks, which also happen to coincide with very high volume price ranges (two purple zones).