How to generate a bed file indicating increased ratio of H3K4me3 to H3K4me1

Question

[jia]

Hi,

I got stuck when generating a bed file for increased ratio of H3K4me3 to H3K4me1. Now I have two bigwig files (the y values indicate ratio of H3K4me3 to H3K4me1) at two conditions (control and treatment).

Next I want to generate a bed file (or other format files) containing peaks indicating increased ratio between the two conditions.

I couldn't find tools fixing this

Could anyone help me? Thanks a lot!