The real key to trading.. let me tell you.

Number 1: Identify the major trend (up or down)

Number 2: Trade that trend...as if give higher probability. Build small positions...
and keep adding to that trend and let time make the trades mature.

Minimize ultra short term trading... which will likely cause you psychological and $$$ damage.

As to how to identify trend and add positions... you have to find it yourself. Without number 1, nothing can work. Think of major trend as Big Boss and adding positions as Workers. Add more Workers along with the Big Boss. If Big Boss turns, take out Workers batches by batches.