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How do write a formula that tells me the Bollinger Band has just started or started to expand for the past 2 or 3 or 5 dys ago.
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Rank: Advanced Member
Groups: Registered, Registered Users
Joined: 5/20/2008(UTC)
Posts: 53
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bull&bear wrote:How do write a formula that tells me the Bollinger Band has just started or started to expand for the past 2 or 3 or 5 dys ago. That would be : time:=20; barssince(cross(stdev(C,time)-ref(stdev(C,time),-1),0)<=5
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Rank: Member
Groups: Registered, Registered Users
Joined: 3/24/2008(UTC)
Posts: 22
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thks for help.
but exploration are all 0,sth missing ?
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Rank: Advanced Member
Groups: Registered, Registered Users
Joined: 5/20/2008(UTC)
Posts: 53
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Sorry, The last bracket was missing.. The correct formula would be :
time:=20;
BarsSince(Cross(Stdev(C,time)-Ref(Stdev(C,time),-1),0))<=5
This is for a 20 periods bollinger band.
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