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# Question for brainy math person: How to calculate new setting for ParabolicSAR

Discussion in 'Technical Analysis' started by birdman, Jan 11, 2019.

1. ### birdman

I trade stocks and ETFs off a 1 minute chart. Default setting for ParabolicSAR is 0.02 / 0.2

What i want to accomplish is make ParabolicSAR chart (on my 1 minute chart) exactly as it would, if i were running a 3 minute chart.

Logic being, that in general i now use a second window, running 3 minute chart with ParabolicSAR at 0.02 / 0.2 and it serves as my trend identification.

Said another way, I need to somehow adjust the 1 minute chart setting to show same results I'd get on 3 minute.

I bet some of you math wizards will know exactly how? Thanks in advance!

2. ### gaussian

This really isnt a math problem, it's a data problem.

You want parabolic SAR on the 1 minute to be "exactly like it is" on the 3 minute. Therefore, you need to code up a parabolic SAR with a setting that allows you to tell it the timeframe. There's no mapping from PSAR_1MIN -> PSAR_3MIN. It is not as easy as some constant multiple. The bar length changes the entire calculation.

To summarize, make some indicator called PSAR_3MIN that is calculated based on the 3 minute chart. Then use it on the 1 minute chart. You cannot calculate the PSAR for 3 minutes from 1 minute in any way that is reliable. The only way that is reliable is to group the 1 minute bars into 3 minute bars...and therefore you've just used the 3 minute data anyway.

Last edited: Jan 11, 2019
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3. ### schweiz

In Ninjatrader you can do this.
In this screen there are 2 parabolics in the 1 min chart:
• orange line is 1 min parabolic
• orange dot is 3 min parabolic
You can compare the dots in 1 min with the dots in 3 min. They are exactly the same.

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4. ### RedDuke

Was about the suggest the same on Ninja with multi time frame.

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5. ### birdman

Thanks for all the comments. I use TOS and i may have to continue watching 2 screens.

Last edited: Jan 11, 2019