Do trading bots and expert advisors work
In short: A bot executes predefined rules and is exactly as profitable as those rules. Ready-made "bots with guaranteed income" are almost always either scams or strategies curve-fitted to the past.
Why bought bots disappoint
They are tuned on history so the equity curve looks perfect. On the live market conditions change and the system starts losing. Averaging-down strategies are especially dangerous: they show smooth growth for a long time, then one strong trend takes the account.
When automation helps
When you already have tested rules and want to execute them without emotion. Skill and statistics first, automation second — not the other way round.
Example: a robot that "made 300%"
The seller shows a backtest: +300% over two years. But the rules were tuned to fit exactly that past period — this is called overfitting. On new data the robot "has not seen", such a system often loses money in the very first month. If a robot truly earned steadily, why sell it for $99?
When automation is useful
A robot is good as an executor of your own proven rules: it does not get tired, nervous or remove the stop-loss. Simple helpers are useful too: price alerts, automatic position sizing, stop and target placed at entry. But first the rules must work for you manually.
How to check any system
A backtest, then a check on a period that was not used to tune the parameters, then several months on a virtual account in real time. Look at the maximum drawdown and the number of trades, not just the final return. If the seller will not give you this information, you already have your answer.
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Trading on financial markets carries a risk of losing money. This material is educational and is not investment advice.
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