Hi,

I am trying to use external libraries with JForex SDK, but when I click project properties, there is no library option, other projects have this option but JForex SDK does not have it.

So how I am supposed to add external library to JForex SDK if there is no option to do so?

You need to add the dependencies in the pom.xml file in a similar fashion than it is done with the DDS2-jClient-JForex and the JForex-API artifacts. Read more here:
https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html
and in particular:
https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#Dependency_Management

Ok I figured out how to add libraries to strategy in jforex.

So, I use @Library("path/filename.jar")

I need to import a lot of libraries, is there a way to specify only folder where libraries located?

As far as we know there is no such feature. However, if the dependencies depend on one another then it would suffice only to add the "head" dependency, like it is in the JForex-SDK project, where it suffices to add DDS2-jClient-JForex in order to import all its dependencies. Here is an example how you add a local dependency:
https://devcenter.heroku.com/articles/local-maven-dependencies
But before using this approach, have a look if there is no public repository for the dependencies that you use.