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Registered User
Joined: 10/7/2004
Posts: 35
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I am preparing to do a longer term study of TRIN and TRINQ against the major indices and some index components. Because of the nature of TRIN and TRINQ, the logarithmic scale is limited to 0 to 10, with the center being 1.00. Is there a way to control the origin as well as the scale differential? That would allow a user to set a template for normal charting (origin = 0, only positive values allowed), and a different template for some kind of special charting (e.g., origin = 1 with positive values allowed, or origin = 0 with negative values allowed).
I don't see a way to access this kind of display control using the Chart Scaling control window. Am I missing something, or is this beyond the limits of TCNet's designed capability for 2000 and 2005?
As an alternative solution, could I use a PCF to generate a data value which could be plotted in the Middle or Bottom chart window?
Thanks.
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Worden Trainer
Joined: 10/1/2004
Posts: 4,308
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TeleChart does not have the capability to change the price chart scaling so that you can select the origin point, allowing for negative values.
If you use a PCF, you can check the Center Zero Line box, which would allow plotting of both positive and negative numbers above and below zero. This doesn't sound as though it will provide the flexibility you're looking for, however.
Perhaps one of the other trainers, or someone checking out this thread, would have a suggestion for you.
- Doug
Teaching Online!
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Registered User
Joined: 10/7/2004
Posts: 35
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Thanks. I appreciate the input. Sometimes constraints can be worked around or overcome, and sometimes they can't. We'll get on with this the best that we can.
Thanks again.
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Registered User
Joined: 1/1/2005
Posts: 2,645
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QUOTE (Seeker) ... the logarithmic scale is limited to 0 to 10, with the center being 1.00.
Zero is not on a Logarithmic Scale and one is at the center only by coincidence. If you would like to see a Logarithmic plot of C, C positive, with any positive number x at the center, construct the Custom Indicator:
LOG(C/x)
and check "Center Zero Line".
There is considerable versatility in scaling Custom Indicators. For example, you can plot C right-side up and up-side down. Construct the two Custom Indicators:
C
and:
(-1)*C
Do not check "Center Zero Line" or "Plot using price scale". This should appeal to those interested in the VIX.
Any Custom Indicator can be plotted to any scale you please, with horizontal grid lines included. The drawback is that if you change the item, the right-edge, the zoom, the time frame, etc., you may have to change the PCFs. The procedure can be used to plot different indicators to the same scale. I personally have no interest, but, I will describe the procedure if you desire.
Thanks,
Jim Murphy
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