$5,000 is way to expensive for an EA. Looking at the myfxbook chart they made most of the profit on a few large bets. But let’s put that aside; are you certain they use the EA they are trying to sell to you? They might just sell you some random (free) EA to take your money and keep the one they use in their trading.
Another thing to keep in mind - even if they give you the EA you might still lose money as they probably know when to turn it off and when to let it run (some EAs work best in ranging price, others in trending, others fail to work on important news while others outperform, and so on…). If they don’t show third-party verification for you to compare trades consider it a red flag.
On the other hand they might give you the EA and you’ll be still making money. But $5,000 is a lot, our suggestion would be to keep your money for the time being until someone verifies their performance.
5 K for an EA? I don’t think is a good idea. High cost does not mean High quality. Backtested many very expensive EAs for sale on Mql5 and all of them fail miserably in the long run.
There Are many more than decent eas sold for few hundreds and many available for free in the web. U just need the vendor showing a real account with a decent history, then run a BT and see If trades match. If yes, see the long term BTs results and so u understand how the EA can perform in the future (Anyway with no guarantee). Then set a low risk and start to trade. Build a portfolio of 3-4 eas like these and all is done. Consider that BTs Are for sure unreliable for eas using many indicators and also for tight scalpers, where in a real trading environment slippage and delays will kill the profitability. I run tests on many eas to colle t some stats to be then compared with BTs. Successfull Automated trading need patience. And again, there is no guarantee that a system will continue to deliver profits. So diversification is the key.
No robot with a set algo can be 100%. A robot with REAL traders managing your account like something that Dux Forex offers is a much better option since the trades are made by real people.