The BedGraph format allows display of continuous-valued data in track format. This display type is useful for probability scores and transcriptome data.  This track type is similar to the wiggle (WIG) format, but unlike the wiggle format, data exported in the bedGraph format are preserved in their original state.  For more information on this file format, see the UCSC Genome Bioinformatics web site description at

Recognized Extension: .bedgraph