What time do you use for "the open"? (asking seriously, not sarcastically) GMT midnight, or the slow period between NY and Tokyo?
Open two accounts. Place buy stop x points above the open in account #1 and sell stop y points below the open in account #2. X is a continuation trade and y is a reversal trade. y>x. Take profit at x + z% range between x and y. Worst case scenario = x and y both hit. Lock in the loss and liquidate x or y leg next open. Rinse and repeat. Close??