Add Support to Margin Trading with Binance

Expected Behavior

Be able to trade using a margin account with Binance in live and backtesting modes: https://www.binance.com/en/support/faq/c-3#/3/16

Actual Behavior

Not supported.

Reproducing the Problem

        public BinanceBrokerageModel(AccountType accountType = AccountType.Cash) : base(accountType)
        {
            if (accountType == AccountType.Margin)
            {
                throw new ArgumentException("The Binance brokerage does not currently support Margin trading.");
            }
        }

at BinanceBrokerageModel.cs#L43.

Checklist

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• I have confirmed that this issue exists on the current master branch
• I have confirmed that this is not a duplicate issue by searching issues
• I have provided detailed steps to reproduce the issue

[markudevelop]

+1

[markudevelop]

Maybe it’s possible to use coins from Binance and paper margin? I just need all the coins from Binance and short support but don’t have to send those signals to Binance broker.