How would I go about setting up a test that would trade LTC for BTC and BTC for LTC? 
My attempts thus far have failed. 

Here's my last code snippet:

public override void Initialize()
SetStartDate(2017, 1, 1); //Set Start Date
SetEndDate(2018, 3, 1); //Set End Date
//SetCash(3100); //Set Strategy Cash
//SetBrokerageModel(BrokerageName.GDAX, AccountType.Cash);
AddSecurity(SecurityType.Crypto, symbol, TimePeriod);
security = Securities[symbol];

foreach (Security s in Securities.Values)
s.FeeModel = new CustomFeeModel();