Waiting for ETH to pullback and catapult upward

The 3rd wave is usually the BIGGEST wave, thus why I REALLY want to get into ETH at a prime pullback type - situation. Roughly at the 50% to 61.8% retracement. This could EASILY become a nice solid 50 to 100% gain. Failure on a Higher Time Frame at the (.12500000) level will clearly reveal a shift in momentum and exit on my trade if my entry is initiated.