People see some youtube videos of a guy makes profits and think that they can buy such a system for 1300 USD, and now when we got something that is not even working trying to reverse engineer it to operate like the original EA. Think about this yourself for a minute.
The only truly way to know is to actually buy it and then anyway find out that if he manage to find such an edge on the index, he would keep it for himself and just run his EA to a trillion USD within a few years. Okey, sure there might be liquidity issues due to DE40 and 5M timeframe.