Channel that uses the higher high of 'n' periods back for resistance line and the lower low of 'n' periods back for support line.
Note: if you use the parameter 'Use (O/H/L/C/M)' as C (for close) the channels will use the higher close and lower close, if you use H or L the channels will use the higher high and lower low, if you use O the channels will use the higher open and lower open, if you use M the channels will use the higher mid point and the lower mid point ((H+L+C)/3).