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Advanced Bollinger Band indicator - does it exist ?
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Advanced Bollinger Band indicator - does it exist ?

  #11 (permalink)
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Overview View Post
@Fat Tails

Appreciate the comments - my approach is a bit like yours - to set the SD period to the whole chart data load. The interesting thing about ROC as a % is that you see the offset and so can see the mean % increase per ROC period over the whole of the chart period.

If you want to compare ROC charts in the same panel, each with 2 different periods, by using the SD scale you can compare them more directly for variability. Horses for courses I guess. I'd not thought of using ATR for a similar purpose. You are way ahead of me Fat Tails - I was looking at using this for daily charts over 10 years for position rather than day or even swing. Going OT, I would be really interested to know how you use that type of chart - discretionary/automatic and how ? Maybe I can use what you are doing short term to help with much longer timeframes.

I do not use that type of normalization for Bollinger Bands, but I have applied it to a number of other indicators.

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  #12 (permalink)
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@ forrestang

Oops - was n't watching the thread for a while .....
What you have is working nearly perfectly - I use daily charts a lot and if I have the data load set to 3650 days, and the ROC to say 10 days, if I set the period in the OverviewBB to be above about 2000 periods, the lines seem to disappear. I can survive with it as is but if it's a quick fix that would be great.

Something to keep in mind, the indicator needs a certain amount of data to begin calculations. Whatever 'Period' you input for the indicator, its needs a minimum of that many bars on the chart before it even begins calculating, this is there to avoid trying to calculate data based on a bar index that doesn't exist.

So that means if you input a period of 2000, you need a MINIMUM of 2001 bars on the chart before the indicator makes it's first calculation. So if you like to look at 3000 days with a 'Period' of 2000 for example, you know those FIRST 2000 bars, the indie WILL NOT perform any calculations as it needs at least that many bars to perform the bollinger calculation.

SO if you put 3650 days on your chart and set your 'Period' to 2000, you won't see any calculations for the indicator during those first 2000 bars. If you want to see the values for those bars, then you need more days loaded on your chart.

Try taking that into account and lemme know if the problem still persists. I'll add some more lines on it after you lemme know if you get things working the way you want.


Last edited by forrestang; September 22nd, 2011 at 09:29 AM.
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  #13 (permalink)
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  #14 (permalink)
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Thanks all !

@forrestang - OK - and thanks very much for the help
@Big Mike - wilco

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  #15 (permalink)
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........

@forrestang - now tried the indicator out - works fine. Still a little confused about the short chart drawing because the standard BB indicator does n't have that behavior, but I can certainly live with it. Thanks very much and if you feel like adding a 4th band sometime that would be great

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  #16 (permalink)
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Overview View Post
@forrestang - now tried the indicator out - works fine. Still a little confused about the short chart drawing because the standard BB indicator does n't have that behavior, but I can certainly live with it. Thanks very much and if you feel like adding a 4th band sometime that would be great

I think you probably have figured it out, but just in case.......

Well, for the 'short drawing,' think about it this way, if you were told to calculate a moving average based on 20 bars by hand, how could you calculate it if you only had 10 bars and not a full 20? You could fit an approximation in there, but your calculation WOULD NOT be an ACTUAL 20 period moving average. It would be a 10 bar moving average.

So what the study is doing, is WAITING until it has a minimum of whatever period YOU input as a PERIOD. Once it has that many bars + 1, that is when the study starts performing a calculation.

Here is the study with the 4th band added, renamed for simplicity.

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What is that...

forrest?

dang it, I want to follow this thread.

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  #18 (permalink)
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wldman View Post
forrest?

dang it, I want to follow this thread.

THIS one, or do you mean my other thread? This is just an indicator OverView wanted.

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  #19 (permalink)
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The other one I guess..

final color final coat going on today, then staining ceiling planks building window seat installing floor, putting up trim and moving them in.

Question on the NT standard bollinger. If I wanted to be able to use ema or a diffetent ma for the calc...how hard is that for you? DB

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wldman View Post
final color final coat going on today, then staining ceiling planks building window seat installing floor, putting up trim and moving them in.

Question on the NT standard bollinger. If I wanted to be able to use ema or a diffetent ma for the calc...how hard is that for you? DB


Probably about 76 seconds.

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