历史波动率 – 窄幅 4 内线 (Historical Volatility Ratio–Narrow Ran)
来源：ForexFactory · Trading Systems · 原帖链接
原帖作者：dryclean
发布日期：First Post: Apr 25, 2009 11:51pm | Edited Apr 29, 2009 12:08am
原帖作者：dryclean
发布日期：First Post: Apr 25, 2009 11:51pm | Edited Apr 29, 2009 12:08am
HVR-NR4/IB
That would be the Historical Volatility Ratio–Narrow Range 4 Inside BarHas anyone any knowledge with the HVR-NR4/IB system
I've had success with just a plain IB on 30 min TF but I don’t have time to sit all day and watch I'm looking for a daily. This system as the author states is old. Just wondering if anyone has tried it lately with success
Attached are the pdf and some files I've used.
I have only tinkered with this and have no real results
It's not pure price action but it looks promissing
The NR4/IB Set Up
The NR4/IB set up is a combination of a narrow range bar that is the smallest of the last
four days while at the same time is an inside bar against the previous days bar.
Let’s look at each component and bring it together so you can easily identify this set up.
(NR4) Narrow Range 4 Bar: A NR4 is a bar with the smallest range of the
previous four bars to include the current bar.
(IB) Inside Bar: An inside bar is a bar where as the high is equal to or lower
than the prior days high and the low is equal to or higher than the prior days low. It’s
important to note here that only the high OR the low can be equal to the prior days high
or low – not both. It’s crucial that either the high or low be inside of the prior days range.
(NR4/IB) Narrow Range 4 Inside Bar: (above) To have an Inside Bar Narrow Range 4,
the current bar has to be a combination of both a NR4 and Inside Bar as describe above.
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