how so? you don't know how to place an order? when to buy or how?

I've been on Binance for a short time, and what this image shows makes a lot of sense. I always try to buy a coin $SOL o $ZEC y, and as soon as it goes up by $10 or $15, I sell it. My intention is to grow my money, not lose it. Daily, even if 5$USDT I am making a profit over time. I don't trade because I don't know how to do it.