USDJPY runs down toward 50% retracement/200 day MA in quick move. Bounces

Lots of support int eh 108.33-45 area
The USDJPY fell below the 100 hour moving average at 109.038 and a upward sloping trendline. The combination put sellers more control and the pair just ran down to test the 50% retracement at 108.456 and the 200 day moving average at 108.388. The low for the day just reached 108.415 and quickly bounce back up to