There are many reasons not to buy ready made expert advisors.In the above example , the seller is showing 6000 % profit, but is not acknowledging blown accounts.The buyer does not know the code, it may have trojans and viruses, using dll.Personal information can be stolen via dlls, passwords on your computer can be changed.

The buyer can not go these sites and post anything in public, his threads will be deleted and buyer will be banned eventually.

It is much safer and better to make your own expert advisors. Please do your own diligence,

forex tsd warning on google

http://www.trade2win.com/boards/trading-software/81856-forex-tsd-warning-google.html

renamed and rehashed indicators for sale n ex4 files , now available at ml5.com

There are 10,000 systems on forums designed by amateurs and learners, 95 to 98 % of them fail by using amateur systems , this is designed for professional trading.

All these charlatans are creating 3,000 indicators from one simple moving average on mql5 site , these people are coders /not traders .You only need to use the pip master correctly, you only need one indicator.

pipmaster is free , don't get scammed with renamed and rehashed indicators on mql5 site , they all do the same job. A car only needs one indicator, does a car have 3,000 indicators?Only charlatans make 3,000 indicators and sell them.I can show you hundreds of indicators made from a simple moving average, they are useless.