Can isBuyer and isMaker both be True or False?

API Spot/Margin API
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1

Hi,

I’m using testnet to develop my application for Binance and am running into some issues with the myTrades endpoint. I’m trying to determine whether a trade was a SELL or BUY from the user’s perspective and it looks like I should be using isBuyer and isMaker to determine that. This seems to be correct for every trade, except for one:

{'symbol': 'BTCUSDT',
 'id': 1415371,
 'orderId': 6322569,
 'orderListId': -1,
 'price': '61070.63000000',
 'qty': '0.00032700',
 'quoteQty': '19.97009601',
 'commission': '0.00000000',
 'commissionAsset': 'USDT',
 'time': 1634419442839,
 'isBuyer': False,
 'isMaker': False,
 'isBestMatch': True}

Is this just some bad data in Binance’s testnet? What am I not understanding here?

2

Hi. This is a possible case.
isBuyer = False and isMaker = False means that the SELL order got filled immediately. This is a taker order since it matched the BUY order already stayed in the orderbook.

1 Like
3

Right, so when looking at myTrades, isBuyer alone is enough to determine whether the trade was a BUY or a SELL on my part?

That’s great news!