So I have done even more calculating and realized that it simply does not make sense to weight deviation by volume. I had tried weighing the intra-day patterns by volume, but it skewed the entire patterns to something unrecognizable. In short, there is so much volume the first 30 minutes and last 30 minutes, it essentially would degrade any intra-day modeling across the day. It's best to keep with a moving average. With that in mind, the same is holding true for the Deviation Score. So I am officially updating this model to an Deviation Score of 1.59% - an outstanding result. I also found an error in my weighted deviation score, so if I were to weight it by volume, it improves by 5% up to -14.94%. All this means is that if I were to look at the first 30 minutes on a Tuesday, The actual forecasted value was much higher than the model predicted---but the overall pattern/curvature remained the same. I may need to do some more advanced research to calculate curvature (logs) and compare.