Hey everyone,
I’ve been facing a weird issue while trading using the Binance API for spot trading, and I’m hoping to get some input from others who might have experienced similar problems, or if anyone from the Binance team could suggest a potential solution.
Here’s the situation:
Preformatted textI’m using USDT to trade and perform spot trading on Binance via their API.
Suppose I want to buy a crypto (let’s say, “XYZ”) that is priced at $1.
I place an order to buy 5 units of XYZ. After sending the order, Binance charges a trading fee, and typically, Binance adjusts the quantity based on the fee and the available balance.
In this case, after executing the buy order, I end up with 4.99 units of XYZ instead of 5, due to the fee and rounding.
Now, my strategy is to sell the same quantity of XYZ (5 units) into USDT. However, the issue arises because I only have 4.99 units of XYZ in my balance. As a result, the API returns an “insufficient balance” error.
To fix this, I tried adjusting the sell quantity to match my actual holdings (selling 4.99 units), but that’s where another issue pops up. The step size for XYZ is 0.1, meaning that I can only sell in multiples of 0.1. So, the nearest valid quantity I can sell is 4.9 units, not 4.99.
So, my question is:
How are others handling these types of situations in their strategy-based API calls, especially when dealing with trading fees, rounding issues, and step size limitations?
Any best practices for adjusting the quantities automatically in such scenarios to avoid errors?
Any insights or suggestions would be greatly appreciated!