How to grab the previous week's High and Low from an Intraday chart

[stefy]

I'm working on 30min charts and I'd like to grab (and plot) the previous week High, Low and Close.
How can I do that, working on 30min data?

Thank you

[NinjaTrader_JoshP]

Hi stefy,

You will want to use PriorDayOHLC(). To figure out which barsAgo you need to pass in to get the correct prior days' data you can use GetBar().