You can find the Export button on the toolbar of the Editor tab.
You export the current Expert that is shown in the Editor.
There are several Export options:
The exported Expert Advisor is 100% native MQL code and doesn't require third party libraries or indicators.
When you start the Expert Advisor on a MetaTrader chart, you can review its options in the Input tab.
Yuo can test the experts in the MetaTrader strategy tester.
You have to receive the same result in MetaTrader test as in EA Studio. In case of discrepancies, check if you are using the same data, spreads and commissions. If the discrepancy still exists, please open a topic in the support forum.