Hello all,
need advise, if any exist

I am trading btc few years - but it seems I havent learnt anything. My plan was to use bitcoin volatility to earn some extra btc, but it seems I am not able to do this.
I am selling/buying always in wrong time. Using volume as only indicator, as others do not make sense for me.
For example I see a series of red candles with increased selling volume, price crossing support line (like today crossing 7040, 7000, 6900 USD) so I sold 0.8btc in expectation price fall to 6500 usd as few days ago.
But 1.5 hour later price changed and went up and my prediction was again wrong. And the same is during increase of price. If the price hits e.g. 10300 usd and starts falling I do not sell, because I am not sure when it will turn again. And then I usually miss fall in price from 10300 to 7300 which is finally 3000 usd, what you can earn on 1 sold btc at correct time.
Am I doing something completly wrong? Or it is not possible to predict the movement of btc?
thanks
P.
i can see you are a newbie , i guess you planned to major on trading for you to have run here with this rank to get help. you need a lot of knowledge to start trade and be successful about it. insufficient knowledge has affected alot of people here. that bitcoin is volatile should first be on every traders mind, price value is never stable, but what yon need to do is set your selling/buying prices at your targeted value, to sell at set time.