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bedgraph file format in IGV: good for observing CNV ?

Hello,

I found here that I can use begraph format to observe CNV in IGV. Suposedly, I will be able to see overrepresentations and deletions, so I converted my (aligned reads) bam file to bedgraph and opened it on IGV.

My question is if what I am seeing is actually an overrepresentation, see image attached.

 bedgraph file opened with IGV. An overrepresentation?

igv cnv bedgraph

Because I have found bedgraph format, and i am adding an image to see if i am on the correct path

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