I am creating an automated strategy on a 5 tick renko chart. Does anyone know how to condition a trade against a higher time frame, let's say 60 minute bars? So for example, only take long trades on a 5 tick chart when the 60 minute bar is greater than a 20 hour moving average?

Press F1 and search the help file for "Multi-Time Frame & Instruments", it tells you how to do it. It's pretty simple actually once you get the hang of it.