But it's best not to buy an all-in with $10 right away because if the price keeps dropping, you can't buy it anymore. Usually, I'll place a buy order 3 or 5 down the line from the buy order and wait for it to fill. And if the price continues to decrease after that, I will place a buy order on the bottom 5 rows again.

until when this will be given? 10$ might be high to buy now but what if the price grows overnight then the chance of buying will be increase prices also .
If the price grows overnight, it is an advantage for us because we can sell it at a high price and don't have to buy at a low price or hold it for too long.
And that's just an example that I usually use, but maybe the usage also depends on the situation and conditions that occur in the market. If you can analyze it better, you will know whether to place another buy order at a lower price or simply place a single buy order, as I showed you. It all depends on your experience and expertise in analyzing it.