Could you recommend a Youtube video or a book on how to create a good EasyLanguage trading system?

Building Winning Algorithmic Trading Systems, + Website: A Trader's Journey From Data Mining to Monte Carlo Simulation to Live Trading by Kevin Davey aka @kevinkdog

These books contain complete Trading System codes in Easylanguage and explain how to build, optimize and test Trading Systems:

- The Ultimate Trading Guide - J. Hill-Pruitt;

- Trading System that Work - Thomas Stridsman;

- Building Winning Trading System with Tradestation (1st and 2nd edition)- G. Pruitt, J. Hill;

- Cybernetic Analysis for Stocks and Futures - John Ehlers.

SMCJB 

Building Winning Algorithmic Trading Systems, + Website: A Trader's Journey From Data Mining to Monte Carlo Simulation to Live Trading by Kevin Davey aka @kevinkdog

Thanks! I'm reading it right now.

Are there any modern authors who are writing about TradeStation EasyLanguage after 2015?

If you decide to test the Trading System contained in the books that I have listed above, I advise you to try them removing the Exits (Sell and Buytocover) and perhaps adding 1 or 2 Inputs (avoiding the overfitting).