trailing stop loss failure when it's a margin order

API Spot/Margin API
,
1

I use create_order() from python-binance.readthedocs.io as such in the spot account for the SIDE_SELL:

        `order = client.create_order(
            symbol=ticker,
            side=SIDE_SELL,
            type=ORDER_TYPE_STOP_LOSS_LIMIT,
            timeInForce=TIME_IN_FORCE_GTC,
            quantity=quantity,
            price=final_stop_loss,
            trailingDelta=rounded_trailing_delta,
            newClientOrderId=trade_ref
        )`

This works just fine.

I do the mirror version in the margin account for a SIDE_BUY:

        `order = client.create_margin_order(
            symbol=ticker,
            side=SIDE_BUY,
            type=ORDER_TYPE_STOP_LOSS_LIMIT,
            timeInForce=TIME_IN_FORCE_GTC,
            quantity=quantity,
            price=final_stop_loss,
            trailingDelta=rounded_trailing_delta,
            newClientOrderId=trade_ref
        )`

It should work but does not. The error I receive is

APIError(code=-1102): Mandatory parameter 'stopPrice' was not sent, was empty/null, or malformed.

But ‘stopPrice’ is not a needed variable when placing a Trailing Stop Order with a trailingDelta. If I put a stopPrice Binance places a basic Limit Order with a trigger (stopPrice) and an execution price (price)

This is from Binance itself:

Trailing Stop Order Examples ; Excluding stop price POST ‘https://api.binance.com/api/v3/order?symbol=BTCUSDT&side=BUY&type=STOP_LOSS_LIMIT&timeInForce=GTC&quantity=0.01&price=42000&trailingDelta=500&timestamp=&signature=’

Which confirms I should be right. I am at loss…