hbar falling down

so how we can buy at the deep
when price come low support buy 20% trade
and price going more down then wait for price come in strong support then buy 30% again and
price going to touch resistance then sell your trade
And price breakout the resistance then wait for retest and buy more

note :- hbar in downtrend and no anyone know when price revers so trade carefully and my opinion hbar uptrend coming soon