There are two main criteria which you have to program rules for and they are – Market Entry and market exit or your stop. You can use a huge number of indicators to time your trades but on an automated trading system, you need to use as few as possible an here I am going to show you how to build a 1 rule system simply based upon trading volatility.
A very simple system would be one based on the standard deviation (volatility) of price. The Bollinger Band for example, shows a mid average band and the two outer lines, are standard deviation from the norm or average, as volatility increases the bands widen away from the average. You can easily construct a simple volatility system with your own settings so here is what you do ..
You would have to decide a mid line moving average to start. This is where prices will find support in a bull market and resistance in a bear market. A buy signal, would be generated (and held) in a bull market when the average is hit, the outer bottom band would provide the stop level.
What you need to do is to test various moving rates and standard deviation settings for the outer bands but this is easy to do with today's software. You would then, need to decide a spread of contracts to trade it on and test it back over time, to see how successful it is – because it only has one rule, it will show a realistic back test of performance.
The logic of the above system is easy to understand and below, you will find how to generate a buy signal and stop in a bull market.
In a strong bull trend, prices may go away from an average price but they will typically find support against the average. If volume takes prices through the mid band to the outer bottom band, the supply and demand situation is probably changing from bullish to bearish and a stop can be placed
You have to do a bit of research and you can add additional filters if you wish but a volatility based system if traded on a spread of uncorrelated contracts will work (they very rarely work on a single contract).
I have seen people make huge profits with simple automatic systems and you can too. Sure you have to spend some time researching and testing and also as with any system trade long term but if you do a bit of work, you can easily build your own Forex automated trading system and make some great profits in under 30 minutes per day.