Pascal, thanks for your reply.

You are right I am a developer and also a trader.

I am not asking you to support me for technical or developing question, my question about LER was only because I found two different statement, one reading the VIT book and the other searching on this forum.

Pictures pages 128 and 129 tells to use the LEV ratio then divide by volume while on this forum you states to get the difference from positive and negative LEV, then divide by volume.

I am only a little bit confused about what to use, nothing more.

My best regards,

Alberto