The key to profitable investing, is to make profitable trades.
I know it seems over simplistic, but there are only 3 possible options available.
The markets either (1)move up, (2)no movement, or (3)move down.
(1)Market movement is bullish? Buy
(2)Market does not move? Do nothing
(3)Market movement is bearish? Sell
If you make a trade and the market moves in that direction, you've made a profitable trade.
If it's not a profitable trade close it, then wait for the next entry point of highest probability.
If you want to be profitable, make profitable trades.