If in Initialize() function I set 

Securities[a_CurSymbol].SetDataNormalizationMode(DataNormalizationMode.Raw), then I receive raw prices in OnData function. But when at the same time I try to get historical data with help of function History("SPY",1,Resolution.Daily) , I receive tradebars with Adjusted prices. So, the question is how to get historical data with row prices, using History function?