The default importing for Quandl seems to only support the stock prices with a property called 'close'. When I execute the following line AddData("PSYCH/SNY_I", Resolution.Daily);

The following error pops out:
Error invoking PSYCH/AAPL_I data reader. Line: 2015-04-25,1.817653,1.660536 Error: Property with name 'close' does not exist. Properties: Time, Symbol, Value bullish, bearish