backtesting is a method to test a currency exchange expert advisor against historic data. It allows a trader to discover how a robot would have performed in the past. But while that gives some discernment, it doesn’t guarantee the EA will work in the future. The past data can have errors and may not reflect the reality, also some EAs go as far as adjusting specifically for past conditions which will not happen in the future. As a trader you must scrupulously consider backtesting and live trading results. If you consider the new Forex Cash Rocket robot, you’ll see how this works. It shows back-testing results and live trading results. You must consider these results whenever you make a choice and keep in mind that you have to take care.