$SPY inching towards a supply zone that has shown a big imbalance at the $206.50-$206.86 levels. Has been tested before so the level isn't fresh but the last retest was rejected with a gap down showing institutional interest to sell. Working on locating my S/D zones with more accuracy, looking to short into the supply zone, entry around the $206.66, stops just above the supply zone, aiming for a flush in the 204s