Does Bitmex Bulk order require different parameters?

I have successfully placed all necessary orders via exchange.create_order. Now i would like to optimize work with exchange and place one bulk order instead of sending orders separately.

Example of code for separate Stop order placement. It works

parameters = {'stopPx': stop_loss, 'execInst': 'Close'}
await ccxt.bitmex.create_order(symbol, 'Stop', side, amount_per_trade, None, parameters)

Code which i am trying to use for bulk order placement (Stop)

orders = list()
parameters = {'stopPx': stop_loss, 'execInst': 'Close'}
orders.append({"symbol": native_exchange_symbol, "type": "Stop", "side": order_side,
               "orderQty": amount_per_trade, "price": None, "parameters": parameters})

await ccxt.bitmex.private_post_order_bulk({'orders': json.dumps(orders)})

Data in orders list. <class 'dict'>: {'symbol': 'ETHUSD', 'type': 'Stop', 'side': 'Sell', 'orderQty': 111.0, 'price': None, 'parameters': {'stopPx': 199, 'execInst': 'Close'}}

returns error -->{“error”:{“message”:“Invalid stopPx for ordType”,“name”:“HTTPError”}}

It seams that I am doing something wrong with parameters…

• OS: Linux
• Programming Language version: Python 3.6
• CCXT version: 1.18.824
• Exchange: Bitmex
• Method: private_post_order_bulk

[kroitor]

@qwasko1212 why do you send parameters to bitmex? Their endpoint for placing orders does not support a key called parameters inside an order. Each order should be a plain dict without nested dicts, and the stopPx should be on the same level with price.

order = {
    "symbol": native_exchange_symbol,
    "type": "LimitIfTouched",
    "side": order_side,
    "orderQty": amount,
    "price": price,
    "stopPx": ... // ←------------------------ HERE
    "'execInst": 'Close' // ←--------------- AND HERE
}

orders.append(order)

[brandsimon]

Also, bitmex doesnt support bulk market orders. https://blog.bitmex.com/api_announcement/update-to-bulk-order-request-functionality/