is it legal to make ea based on market bought indicator ? help please

 
is it legal to make ea based on market bought indicator ? help please
 
If creating an EA from someone else's indicator, it's a bit complicated to create it, I think it's not what I want
 
it's legal if its licensing terms are fulfilled.
 
Forex Sniper:
is it legal to make ea based on market bought indicator ? help please

Of course it is legal. Why shouldn't it be?

It may be a different matter if you are planning on selling the EA. In that case I am not sure that the indicator would work, even if included in the EA file as a resource. It may be necessary for the purchaser of the EA to also purchase the indicator.