For MetaTrader 5: %Data Folder% /MQL5/Indicators/.For MetaTrader 4: %Data Folder% /MQL4/Indicators/.You can find your Custom Indicators in the following folders: MetaTrader itself has a list of built-in indicators that you can use, but you can't modify. There is a term Custom Indicators - these are the indicators that you can write for MetaTrader. MetaTrader reads that information and prints it in on the chart. These arrays are called output buffers (or simply buffers). Technically, all indicators work in the same way - they fill some arrays with numeric data. But in this case the information is not visual, it's just numbers, because computer programs understand numbers. Indicators can also give that information to other programs - Expert Advisors or Scripts. This information could look like lines, histograms, arrows or any other kind of visual information that you can see with your eyes and decide how to trade. The purpose of the Indicators is to give you visual information that might help you while trading.
