How to make an automatic forex trading strategy This guide was written with MQL in mind but could work for any scripting language. The idea of the scripting language should not be overcomplicated – the language serves as a set of commands which will tell your strategy how to behave. Components of a working strategy: 1. Filters – You should have to meet several global criteria before looking for signals. Filters could be time of day, volatility, or indicator based. Each strategy should have several filters which should be adjustable by the user. Too many filters will produce no trades. 2. Inputs – When coding, make use of inputs as much as possible. Instead of ‘hard coding’ a value into a strategy, declare it as a global variable or global input which can be changed later without actually changing the code.