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#1 Selling Amibroker Plugin featuring:
Bollinger Bandwidth for Amibroker (AFL)
Developed by John Bollinger. Creator of Bollinger Bands. used to identify period of low volatility
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Indicator / Formula
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | // Formula Name: Bollinger Bandwidth // Author/Uploader: Buvanes // E-mail: buvanes1989@gmail.com // Date/Time Added: 15.0.2010 12:45:00 // Origin: Translated from the "Bollinger on Bollinger" by Dennis Skoblar // Keywords: Bollinger //volatility is plotted on a percentage basis. Used for trading system //volatility should be compared on a relative basis not on //absolute basis. A six month low should be taken as a period of extreme low volatility //according to bollinger. THen a breakout can be traded with the help of bollinger band. //however u can backtest according to your wish _SECTION_BEGIN ( "Bollinger Bandwidth" ); a1= Param ( "period" ,20,10,50,1,0); a2= Param ( "Standard Deviation" ,2,1.5,2.5,0.1,0); a3= BBandTop ( Close , a1, a2); a4= BBandBot ( Close , a1, a2); a5=a3-a4; a6= MA ( Close ,14); a7=a5/a6*100; Plot ( a7, "Bollinger Bandwidth" , ParamColor ( "color" , colorCycle ), ParamStyle ( "Style" ) ); _SECTION_END (); |
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Just one small correction. In line 19 replace ‘14’ with ‘a1’.
Enjoy,
John Bollinger