Hi Fabio,
I doubt there is a way to avoid a systematic drop-off as it depends on what you are ranking.
However, you could try to configure your ranking so that you “displace” the peak value conveniently to the right / left.
- See a solution here from Walter → https://www.portfolio123.com/mvnforum/viewthread_thread,12038_lastpage,yes#70737
- I remember this was also discussed in the past on the forum. E.g. search for “Question concerning ranking best results” on 3 Sept 2016
Caveat → I have never used a displaced ranking myself
Good luck
Jerome