it seems you have posted vacc_01_en, not this Hodrick-Prescot-Channel as seen on the snapshot above
Fixed. Thank you.
Thanks
look very usefull, could we have an audio alert when prices goes outside the channel ?
It repaints, however, that is the nature of a hodrick-prescott based indicator. Just be aware that you cannot 'backward' test on a chart. You can only forward-test.
How would you use this indicator?
The indicator doesn't appear on chart. Would you sort it out ?

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Hodrick-Prescott Channel:
The indicator plots a price channel using the Hodrick-Prescott Filter.
The first step is to calculate the smoothed values of Close prices. After that it smoothed again with higher smoothing period. As a result we will have HP and HPSlow. On the next step we calculate the standard deviation HP relative to HPSlow and construct the channel.
The indicator prints the ratio of a full channel width to HPSlow[0], presented in percents. This text can be easily moved at any place on the chart - just drag it with double mouse click and move.
Author: victorg