I have an algorithim that is working well. I tried changing from SPY to any other symbol, IWM, QQQ MSFT etc..and I'm getting This asset symbol ( ) was not found in your security list. Please add this security or check it exists before using it with 'Securities.ContainsKey(" ")'.

self.equity = ["SPY"]
self.AddEquity(self.equity[0], Resolution.Hour)                                                              

Not sure why changing SPY to any other symbol doesn't work.