Don't buy everything at once, do it in parts, and it doesn't matter if it goes up and you haven't bought everything, find your rhythm and your strategy

There is something strange in Binance, who notices? For example, if I bought when it was red and sold when it was green and made a profit, it keeps rising more and more. But if the market drops again, and I buy when it’s red but hold on for it to rise again, the market goes down even more and only rises if I decide to sell at a loss. What’s the reason?