Im in a metalcore and nu metal band and Im lead vocalist and as such we therefore do a lot of screamo songs like atreyu and As I lay dying or bullet for my valentine and nu metal like linkin park but some of the people of other bands and a couple of my friends are saying that while i scream good I shouldnt raise the volume as high as I do now.....Ill give u an example if this is the line graph of my singing in a song like"runaway" by linkin park

my volume increases by 2x
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Am I right in doing this or should I scream at voice level(I dont even know if thats possible but...)