You think you've done all that the research you need. You browse through various forums for user reviews, asked for opinions in tons of blogs, and made sure you didn't missed a word on the official website. All set. After 4 weeks running in a live account, your EA is still doing a great job - at reducing your equity! Why does this happen?
You are employing a scam brokerage firm
Not all forex brokers allow Expert advisor to run on their MetaTrader4 platform; but even when they permit it, that doesn't mean they'll let it run freely without disruption. Fundamentally, all scamming techniques commonly used for manual traders can be applied to EA as well. That also includes high slippage, stop hunting, disconnecting the Expert advisor from their server, high requotes, and so on.
When you have an MT4-based Expert advisor, make sure you pick a reputable broker with instant execution; that can make it easier for your Expert advisor to function at 100%.
You operate it in default settings
Most EAs come with default settings from the creator. While this might be good, understand that most forex traders who gain good results with their EA never let it operates in default setting. There ...