Hello, I don't know if someone has had the same issue with the one I'm currently having. I managed to write some code and it was working fine initially till I tried to dynamically change all tickers &/ symbols from one part of the code so that it can be changed throughout the code and ended up having a huge mess. Now all the symbols / tickers I add or edit from the code traceback an error 
Backtest Handled Error: Unable to compute order quantity of EGO. Reason: The security type must be SecurityType.Crypto or SecurityType.Forex. Returning null.
Unable to submit order with id -10 that has zero quantity. is there anyone who may be able to help with this issue please?