The market went up in the open but was not able to sustain its momentum
It runs out of gas in the mid day trading, probably traders take their loot before lunch and went on drinking spree early.
The best trade is to put a short position as shown from the arrow while traders went home already.
Exit the trade before the close and enjoy the leftover loot.
That's how in trading, even the big traders are out already you can still capitalize from their leftovers.