REVERSE BIAS will trigger when a bias signal test is held through the A.M. bias window at 10:15. Holding a test of both bias parameters through 10:15 represents so much weak-handed buying pressure being rejected that it puts into play offsetting tests of BOTH counterpart bias parameters.
This makes the bias signal put into play a bias target without yet touching its bias signal, let alone triggering it. So, testing the bias-up target but rejecting it and the bias-up signal becomes a synthetic bias-down.
The bias target will not become unfinished business, especially if the bias signal has been met (this seems counterintuitive).