API call that return values from both history and/or trends based on the date range requested and what the retention settings are. The idea here is to have a single API call to get the data from either history, or trends, or both (mixed/blended) based on a supplied date range. The logic of determine where to pull from should be left to the API and not the client app. Options could include: limit to trends only, limit to history only, and mix or blend history and trend data together (this would pull from history to the end of that data then pull from trends for the rest)