Elder force index not working on kite

As you can see in the image, the force index field is empty, I have put a period of 13. This is also happening when I use trading view charts. Am I doing anything wrong? Or is it just not working?

Thanks for the help Gautam. I didnt know its based on volume, was just learning about it so thought of referring to the actual graph. Also tell me, the ADX on trading view does not have DMI lines, I tried the DMI indicator which has the ADX line. Is it okay?

Haha, about time they update pi. Thanks for the heads up.