Mikejody,

It is not very easy.
There are a lot of systems and you may use any.
It is no problem.
But there are some limitations which you should know before you start:

- Some systems which may be good for one person are not good at all for an other person (for unknown reason let's say).
- Besides, there is no system in the world which can be profitable forever. Because the forex is life, is nature and nobody could program all the nature and all the life. Some of the main subjects may be programed only or taken in to account.
- Besides, to use any system (or EA) we should have some knowledge about the forex and so on.
- there are some rules in the forex to be followed to reduce the losses. But to reduce only because we can not avoid the losses completely and absolutely.
- there are some classical systems based on the classical (means traditional) indicators. We should know these systems and be familiar with these indicators because it was time-proved.

Other members of this forum may add something.