Bid/Ask values in map function

Can I access bid/ask values somehow in the map function? Or possibly some other way?

Right now the only properties I see on the data object passed to the map function are these:

"date","timestamp","index","tradeDate","high","low","open","close","volume","offerVolume","bidVolume","ticks","profile","value","isLast","isComplete","__index","__dateIndex"

Is there any way to see bid/ask values?