This Tool helps to find Upstream Regulators usually with 4 steps:
1) Input your interested Region file;
2) Intersect your functional regions with our ATAC peak regions;
3) Find out Upstream Regulators using the intersect ATAC peak regions;
4) Ranking the Regulator Genes by Associated regions numbers (Cut Size 100bp).
Note that the regions type you specified in the 4th column of your bed file does NOT exceed 50. Otherwise all regions will be bracketed.