I need to make a chart that is supposed to look like a RangeAreaSeries but the problem is that the high and low channel comes in independently. Combining those two collections into a single collection in my view model seems a little messy so before I push that through I wanted to see if there was a way to accomplish the same goal by simply rendering the two series separately and then using a behavior to shade between them. Is that recommended or should I stick with trying to combine the two collections into a single one and bind that to a RangeAreaSeries?

If I am to combine the collections any suggestions on an efficient way to perform that since each collection contains objects with a timestamp and value. I would like to avoid a lookup each time a value comes in to fine the appropriate timestamp to add the value to.