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This would be rolling weekly bars. The problem with this concept is that all your bars will change every day. For example when you scroll your chart forward by one bar, the whole chart needs to be redrawn. This is not a very practical idea.
In the end the information of a rolling weekly bar is just
- the open five days ago
- the high of the last five working days (N-day rolling high)
- the low of the last five working days (N-day rolling low)
- today's close
What do you wish to do with that information?
Why do you need bars that are permanently repainting?
I'm doing backtesting with weekly chart.
I am testing out some patterns on the weekly chart.
So, I need to study the price action and the candlestick pattern each day on the weekly chart.
OK, I found one that allows me to do that.
Stockcharts.com allows me to enter and view a particular start and end date of any stock or etf on the weekly chart.
For instance: If I want to view the weekly chart of GLD ending on Wednesday, the 4th September 2013, I can just do that. This is what I want, thanks.
January 6, 2012 is the first Friday of 2012 and of course Sept 6, 2013 is the date you want - a Friday. Note that the first bar straddles the year 2012 marker....so this leads me to believe that this is the previous complete week ending January 6, 2012.
to prove this I generated another chart...the only difference is I backed up the date to January 3, 2012
As you can see...this is an identical chart.
now I returned the start date to the Friday January 6, 2012 but advanced the end date to Sept 10, 2013
You can see the chart is identical except we added a new candle
If I move the end time 2 more days the chart is identical except the last candle has changed.
So it appears to be creating a partial week at the stop side...whereas it the start time is based on the week ending on the next Friday if you do not start on a Friday.
I hope this helps...though Stockcharts.com does not do intraday charts very well in its free service though I believe there is a lot more capability in its subscribed service...Since I don't do much intraday stuff and don't do forex or futures at all I don't have much knowledge in those areas...actually very little truth be known