1. Usage permission issues. Some EAs have usage time or account restrictions. If the use expires or the account has no usage permissions, it will not run its trading function. However, in this case, ea developers usually have pop-up prompts.

2. The EA strategy contains trading time period restrictions. Some strategies stipulate that the EA trades within a specified time period. If there is a time input variable in the EA parameter setting, then study whether it has transaction restrictions. time period. Usually in EAs developed by foreigners downloaded from the Internet, most of the variable names are in English characters, which are not easy to understand, so if there are time-related variables, you can try to adjust them based on the mt4 chart time.

3. Trading type restrictions. Some strategies specify trading types. If there is a trading type variable in the parameters, you must check whether it is consistent with the name of the current chart type. For example, EA stipulates that it only trades EURUSDmicro with a mini account. If it is used with a standard account, the name of the currency pair must be modified to EURUSD according to the chart.

4. The trading varieties have their own trading time restrictions. Common foreign exchange pairs can be traded from the opening on Monday morning to the closing on Saturday morning. Some CFD index products have specific trading time periods. If you use EA to trade this type of product, you need to check whether it is within the trading time period. If it is no longer within the trading time period, it will be useless to modify the EA parameters. Because it itself is prohibited from trading during this time period.

5. Trading rules restrictions on trading varieties. Problems in this area are relatively common and are the most likely to occur. They mainly include lot size, stop loss and stop profit distance, etc. Different platforms, or different varieties on the same platform, have different trading lot rules. The minimum opening position for some varieties of foreign exchange pairs is 0.01 lots, and for some it is 0.1 lots. Within the same platform, the minimum opening position for foreign exchange pairs is 0.01 lots, while the minimum opening position for crude oil or other varieties may be 1 lot. Then when the EA no longer trades after modifying the parameters, it is necessary to verify whether the lot parameters have been modified. After modification, Whether the lot size complies with the lot size rules of the trading variety.