Trying to find Weekly and Daily Open, Close, High and Low

Hi,

I will be using a cbot in the lower times frames e.g 1hr and want to calculate the previous day pivot point and weekly pivot point. 

How do I get the higher timeframe data series and get the output?

I was trying this

Bars WeeklyPP = MarketData.GetBars(TimeFrame.Weekly, this.SymbolName); 

&

var dailySeries = MarketData.GetSeries(TimeFrame.Weekly);

But it looks like it only gives High and Low ?? and I am not 100% sure how to call it to get the data back from the new data series.

Any help would be great

Thanks