BTCUSDT buy quantity not trading accurate - Binance SPOT Trading

API Spot/Margin API
1

Lets say I have 10000USDT and I buy BTC from 90% of my USDT
My cummulativeQuoteQty should be 9000USDT

But it is showing cummulativeQuoteQty:129USDT, whatever I change quantity to, it always stays between 0to200

It is working fine for other currencies but same request for BTCUSDT is not working like it should

ENDPOINT: https://testnet.binance.vision/api/v3/order?symbol=BTCUSDT&side=BUY&type=MARKET&quantity=9000&timestamp=1615277973290&signature=${signature}

Exchange Response Status is Filled and I’m only sending this request for type MARKET

2

Since it’s a market order, you can’t know the precise amount of cummulativeQuoteQty before the order is filled, this because the cummulativeQuoteQty = executed price * executed quantity.

Please remake the order with newOrderRespType=FULL and paste here the returned payload, so that we can have more details about the filled price(s).

4

Default value of newOrderRespType is FULL for market and limit type orders. I have tried specifying it but still the same situation.
payload: {"symbol1": "BTC", "symbol2": "USDT", "side": "BUY", "type": "MARKET", "quantity": "90%" }
Balance: {USDT: 53045.47885545, BTC: 0.13264600}
Endpoint: https://testnet.binance.vision/api/v3/order?symbol=BTCUSDT&side=BUY&type=MARKET&quoteOrderQty=47740.930970&timestamp=1615355995074&newOrderRespType=FULL&signature=

Balance:
Capture2

Response:

Capture
Capture352×754 12.2 KB

6

It’s executed correctly, the cummulativeQuoteQty = sum (price* qty in the “fills”) = 101000* 0.00433500 + 101000* 0.00039900 + 107060* 0.00014800 + 107060* 0.0001110 = 505,86254.

7

But 90% of 53045USDT is 47740.5USDT. According to the payload I’m sending it should buy BTC from 47740USDT, but why it is buying BTC from 505USDT

3

Are you sure? Not possible to send an order that big.

5

It shouldn’t matter how big of the order I send for MARKET type order. Order type is MARKET so shouldn’t it be executed. If the cummulativeQuoteQty is below 200USDT it works accurate. Yesterday I was buying ETH from 100% of my USDT(around 50k) and it was working fine, but after few hours it started doing the same thing.
Currently BNB is working fine I can SELL/BUY BNBUSDT 100%.

8

yes it matters. You can’t buy/sell 9000BTC in one market order