I find that the 2h candles are useful on the buy side for SPY.  But on the sell side the 1 day candles are better.

June….19 days green (-3 BBd event, ROC -4)   $12 run

Sep…13d (-3BBd event, ROC -4)   $9 run

Oct…15d (ROC -1)     $12 run

Dec…9d (ROC -1)      $7 run

Jan…. (-3BBd event, ROC -3)  $7-$9 run? 185-187

So 9 days green would bring it to Tues., Feb. 11 or 2 weeks from Fed meeting. A $7 run would bring it to 185. Although the topBBd is 186.80 which is also possible.  After crossing the midBBd, it peaks 7-8 trading days after.