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Thanks - very helpful.
Krop
--- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
wrote:
> To investigate the past, move your cursor in some previous bar and
> see.
>
> x=Cum(1);Lx=SelectedValue(x);
> Cond=L<SelectedValue(L);
> n=BarsSince(Cond);m=IIf(IsEmpty(n),0,n);
> Plot(C,"",colorBlack,64);
> PlotShapes(shapeDownTriangle*(x==Lx-SelectedValue(n)),colorYellow);
> Plot(SelectedValue(L),"",colorGreen,1);
> Plot(SelectedValue(Ref(L,-m))," ",colorRed,1);
> Title="The selected Low is the LLV(L,"+WriteVal(IIf(IsEmpty
> (n),Lx,n),1.0)+")";
>
> Dimitris Tsokakis
> --- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx
>
> wrote:
> > Your n is the BarsSince(L<LastValue(L))
> > because :
> > n bars ago the condition
> > L<LastValue(L)
> > was true.[yellow triangle]
> > [The low for that day is from the red line.]
> > Since then, the last Low is the LLV(L,n).
> > [The last Low is from the green line.]
> > All the intermediate lows, from the yellow triangle till the end
> are
> > higher than the last Low.
> >
> > x=Cum(1);Lx=LastValue(x);
> > Cond=L<LastValue(L);
> > n=BarsSince(Cond);
> > Plot(C,"",colorBlack,64);
> > PlotShapes(shapeDownTriangle*(x==Lx-LastValue(n)),colorYellow);
> > Plot(LastValue(L),"",colorGreen,1);
> > Plot(LastValue(Ref(L,-n))," ",colorRed,1);
> > Title="The last Low is the LLV(L,"+WriteVal(n,1.0)+")";
> >
> > Dimitris Tsokakis
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Kropotkin" <backup_dayad@xxxx>
> > wrote:
> > > I'm familiar with these functions. but I can't figure out how to
> > use
> > > them to calculate what I want: ie how many days since an
> expression
> > > was lower than today's value...
> > >
> > > e.g. to know how long since the price was as low as today's low.
> ie
> > > today is an n-day low. what is the formula for n?
> > >
> > >
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, "louwcoetzer" <lcoetzer@xxxx>
> > wrote:
> > > > Hallo !
> > > >
> > > > What about these options from the AmiBroker User's guide ?:
> > > >
> > > > LOWESTSINCE
> > > > - lowest value since condition met Lowest/Highest
> > > > (AFL 1.4)
> > > >
> > > >
> > > > SYNTAX lowestsince( EXPRESSION, ARRAY, Nth = 1 )
> > > > RETURNS ARRAY
> > > > FUNCTION Returns the lowest ARRAY value since EXPRESSION was
> > true
> > > on
> > > > the Nth most recent occurrence.
> > > > EXAMPLE lowestsince( Cross( macd(), 0 ), Close, 1 ) returns
the
> > > > lowest close price since macd() has crossed above zero.
> > > >
> > > >
> > > > OR maybe:
> > > >
> > > > LLV
> > > > - lowest low value Lowest/Highest
> > > >
> > > >
> > > >
> > > > SYNTAX llv( ARRAY, periods )
> > > > RETURNS ARRAY
> > > > FUNCTION Calculates the lowest value in the ARRAY over the
> > > preceding
> > > > periods (periods includes the current day).
> > > > EXAMPLE The formula "llv( close, 14 )" returns the lowest
> closing
> > > > price over the preceding 14 periods.
> > > > SEE ALSO The hhv() function (see Highest High Value ).
> > > >
> > > > Kind regards,
> > > >
> > > > Louw
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > --- In amibroker@xxxxxxxxxxxxxxx, "Kropotkin"
> <backup_dayad@xxxx>
> > > > wrote:
> > > > > How do I calculate how many days since an expression (e.g.
> > > > bollinger
> > > > > bandwidth, or Low) was lower than today's value? ie, if
> today's
> > > > low
> > > > > is the lowest price for n days, what is the formula for n?
> > > > >
> > > > > Thanks
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