isBuyer=false on BUY transactions GET /api/v3/myTrades

API Spot/Margin API
1

Hi,
On account which sold EUR to BUSD - all transactions are marked with isBuyer=false.

EUR → BUSD below:

  • symbol=EURBUSD, id=35111556, orderId=141909118, orderListId=-1, price=1.06470000, qty=319.00000000, quoteQty=339.63930000, commission=0.33963930, commissionAsset=BUSD, time=1678954104948, isBuyer=false, isMaker=false, isBestMatch=true
  • symbol=EURBUSD, id=35111557, orderId=141909118, orderListId=-1, price=1.06470000, qty=1895.90000000, quoteQty=2018.56473000, commission=2.01856473, commissionAsset=BUSD, time=1678954104948, isBuyer=false, isMaker=false, isBestMatch=true

On new account I’ve made isBuyer is working correctly → isBuyer=true for buy and false for Sell.

Is it a issue with historic data? How one can determine if an old transaction is But or Sell?