I saw a video on Youtube where the trader is able to make money trading, even when he is wrong...
When you say a trader made things wrong in trading, it means loss. A trader can not make mistake and get money from trading.
He is able to be in drawdown from 8 trades in a row, because he is not risking a large lot size per trade.
It is a good capital management and let me elaborate it more.
You can start with $100 and if you succeed to increase it to $200 or $500, my advice is to withdraw $100 or $400 profit, and continue to use only $100 initial trading capital to trade more.
You will not lose if your initial capital if you manage your capital this way.
He knows the market will retrace back or close to the original first trade,
Nothing is completely sure in the market.