The band is smooth like a straight moving average trading band, but it also has the ability to adjust for market volatility like a Bollinger band. The width of the trading band increases gradually as the market becomes more volatile. This smooth and controlled self adjustment is key.

To create the Pivot Point Channels, I use a 7-day exponential moving average of the Pivot Points as a base. An exponential Moving Average is a little more sensitive to recent data than a straight simple moving average, however the basic principle is the same.
Next, calculate the average difference between the first Pivot Low 5 and the first Pivot High for each of the last 7 days. To do this, you subtract the first Pivot Low value from the first Pivot High value for each of the last 7 days. You then add up the difference and divide by 7. This gives you the average value of the difference between the first high and the first low pivots.
The final step involves adding this average of the differences to the moving average of the pivots to get the resistance line. As well, you subtract the average of the differences from the moving average of the pivots to get the support line. This creates a channel for the first support and resistance.
(description from the author of the indicator: Joe Duffy).
at the request of the French thread  https://www.prorealcode.com/topic/pivots-points-channel/

Adaptation of a Tradingview code.

REM PIVOT BANDS
//Created by ChrisMoody 11/11/2014
//Current Timeframe, Daily, Weekly, Monthly Pivot Bands
//Special Thanks to Michael S. For Providing Original Code.
// adapted for the platform Prorealtimev10.3 by bolsatrilera

lengthMA=7 // title="EMA Length To Calculate Bands")
PP = (high + low  + close)/ 3
PPEMA = ExponentialAverage[lengthMA](PP)
HP1 = (PP + (PP-low))
LP1 = (PP - (high-PP))
HP2 = (PP + 2*(PP-low))
LP2 = (PP - 2*(high-PP))

// PPD71 = Difference from HP1 and LP1 for the last 7 days
PPD71 = (((HP1-LP1)+(HP1[1]-LP1[1])+(HP1[2]-LP1[2])+(HP1[3]-LP1[3])+(HP1[4]-LP1[4])+(HP1[5]-LP1[5])+(HP1[6]-LP1[6]))/7)
// PPD72 = Difference from HP2 and LP2 for the last 7 days
PPD72 = (((HP2-LP2)+(HP2[1]-LP2[1])+(HP2[2]-LP2[2])+(HP2[3]-LP2[3])+(HP2[4]-LP2[4])+(HP2[5]-LP2[5])+(HP2[6]-LP2 [6]))/7)

r1 = PPEMA + PPD71
s1 = PPEMA - PPD71
re2 = PPEMA + PPD72
s2 = PPEMA - PPD72


return r1 coloured(255,0,0)as "R1",s1 coloured(0,255,0)as "S1",re2 coloured(128,0,0)as "R2",s2 coloured(0,128,0)as "S2", PPEMA coloured(255,0,255)as "PIVOT POINT"