Keep the following in mind before buying an EA (Expert Advisor or robot) at the MQL5 community market:
1 - Never buy an EA that has a version for MT4 only. The reason being that the scammers found a special way of coding that makes the EA perform really well on the MT4 backtester. It seems MT4 interpolates the close data even if you use real ticks from dukascopy exported from a software like tickstory. This flaw is exploited by the scammers to produce those results that look like a holy grail. There is even some threads there talking about this thing, look for "Tester Grails". As soon as you put the EA on a live chart, the performance is completely different. That is why they don´t offer a MT5 version, because if they did, the EA would perform real badly when you tested in MT5 with the "every tick based on real ticks" option.
2 - If the sellers offers the EA only for MT4 and refuses to provide you a demo for forward testing, probably scammer. He knows that the EA will fall apart on the live chart.
3 - Avoid the sellers that sells tons of EAs, specially if most of the EAs area all for the same market. Those are the copy and paste shop runners. They sell the same EA under a different name and just with a few parameters change as if it were a new product.
Now, if the EA has version for both MT4 and MT5 and the performance on MT5 is good, high chance that the EA is solid and will do well. You can even test in MT4 too if you want, the results should be similar.
If you follow the above you gonna avoid headaches over there, because that site is a scammers heaven. If you end up buying something, there is no refund, your money is gone and even if you report those guys to service desk, they won´t do anything.
Good luck
1 - Never buy an EA that has a version for MT4 only. The reason being that the scammers found a special way of coding that makes the EA perform really well on the MT4 backtester. It seems MT4 interpolates the close data even if you use real ticks from dukascopy exported from a software like tickstory. This flaw is exploited by the scammers to produce those results that look like a holy grail. There is even some threads there talking about this thing, look for "Tester Grails". As soon as you put the EA on a live chart, the performance is completely different. That is why they don´t offer a MT5 version, because if they did, the EA would perform real badly when you tested in MT5 with the "every tick based on real ticks" option.
2 - If the sellers offers the EA only for MT4 and refuses to provide you a demo for forward testing, probably scammer. He knows that the EA will fall apart on the live chart.
3 - Avoid the sellers that sells tons of EAs, specially if most of the EAs area all for the same market. Those are the copy and paste shop runners. They sell the same EA under a different name and just with a few parameters change as if it were a new product.
Now, if the EA has version for both MT4 and MT5 and the performance on MT5 is good, high chance that the EA is solid and will do well. You can even test in MT4 too if you want, the results should be similar.
If you follow the above you gonna avoid headaches over there, because that site is a scammers heaven. If you end up buying something, there is no refund, your money is gone and even if you report those guys to service desk, they won´t do anything.
Good luck