How To Test Not Free Experts?

 

Most of none free experts int he market have a demo 

whenever I select It a message asks me to open it in MetaTrader 5

after that I Select Test on ToolBox, so in Strategy Tester in Expert name the name is selected

then i press Start btn in strategy tester and visualization will appear and starts to show history data. but no trades will happened.

Am I Miss something?

 
How to Test a Trading Robot Before Buying
How to Test a Trading Robot Before Buying
  • www.mql5.com
Buying a trading robot on MQL5 Market has a distinct benefit over all other similar options - an automated system offered can be thoroughly tested directly in the MetaTrader 5 terminal. Before buying, an Expert Advisor can and should be carefully run in all unfavorable modes in the built-in Strategy Tester to get a complete grasp of the system...
 
Sergey Golubev:
How to Test a Trading Robot Before Buying - the article

Thanks