Stop Limit Order insufficient buying power

Nevermind I figured it out. If anyone reads in the future: 

1. Quant Connect seems to treat margin separately for limit orders and stop orders. That means if your code uses Market order, Limit order and stop order, You need to divide "Total trades" by 3 to get actuall number of trades. 

2. Limit Orders do not invalidate stop market orders and vice versa. You need to have a system (I recommend using OnOrderEvent) where on 1 order getting filled you cancel the other one. 

I would lock the thread but I can't accept my own answer. 

Hey Vedran, Thanks for answering your own question. 

Quick question, I am making a market order in in the OnData method and then creating the stops and limit orders in the OnOrderEvent method, if any of the sell orders are filled then I cancel all existing sell orders. I seem to be getting a similar error to you saying that my limit order is invalid because I don't have sufficient power for both my sell orders. 

Do you know why this is happening?

        public override void OnOrderEvent(OrderEvent orderEvent)
        {
            // If a filled order
            if (orderEvent.Status == OrderStatus.Filled)
            {
                // Buy order triggers stop and limit orders
                if (orderEvent.FillQuantity > 0)
                {

                    var drop = atr.Current.Value / Securities[Sym].Price;

                    // Set a stop order
                    var stopPrice = orderEvent.FillPrice * (1.0m - drop);
                    StopMarketOrder(Sym, -orderEvent.FillQuantity, stopPrice);

                    // Set a sell order
                    var limitPrice = orderEvent.FillPrice * (1.0m + drop*2.0m);
                    LimitOrder(Sym, -orderEvent.FillQuantity, limitPrice);
                }
                // Cancel all open orders if limit or stop is filled
                if (orderEvent.FillQuantity < 0)
                {
                    Transactions.CancelOpenOrders();
                }
            }
        }

Hi Sean,
When we have standing limit orders, we recommend calculating the amount remaining :
 

usd_total = self.Portfolio.CashBook["USD"].Amount

usd_reserved = sum(x.Quantity * x.LimitPrice for x
    in [x for x in self.Transactions.GetOpenOrders()
        if x.Direction == OrderDirection.Buy
            and x.Type == OrderType.Limit
            and x.Symbol == self.symbol])
usd_available = usd_total - usd_reserved

And use this to place the orders. We recommend referring to the following example algorithm for more information.
Best,
Varad Kabade