Introduction to MQL5

Array Out of Range MQL4: How to Handle MT4 Script Errors

Array out of range errors in MQL4 Forex are a common issue for traders who use MetaTrader 4. These errors occur when a trading activity, such as a script or an expert advisor, attempts to access an array index that does not exist. It can be caused by either incorrect coding or incorrect data entry. To prevent this error, it is important to verify that the array size has sufficient data and that all the coding in the script is correct. Additionally, when writing code, make sure to include a range check for all array indices used. With proper care and precautions, this error can be avoided.