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It seems the calculations should not be affected by
the xy scales. The visual screen certainly is affected greatly, but calculating
the angle should not be an issue.
Slope = (Yend - Ystart) / (Xend -
Xstart) where X is the bar number
This should work OK in any zoom setting, but
only in one time frame at a time.
Ara
----- Original Message -----
Sent: Friday, August 08, 2008 3:22
PM
Subject: [amibroker] X:Y Ration on a
Chart
Hoping someone can help me figure out how to fix the X:Y
plotting ratio on a chart.
For example, if I wanted to find the slope
or angle formed by the line drawn through the Last Close to the
Close of Five Bars Ago, that slope or angle would be very
different if I was zoomed into the chart or zoomed out.
How can I fix
the Y scale against the X scale of a chart in my AFL and make it exact, for
the purpose of calculating these angles? I checked the Users Guide and don't
see any obvious parameter or option I can set.
Right now, this is what
I have at the top of my AFL to plot the
chart:
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g,
Close %g (%.1f%%) Vol " +WriteVal( V, 1.0 ) +" {VALUES}}", O, H, L, C,
SelectedValue( ROC( C, 1 )) ));
Plot( C, "Close",
ParamColor("Color", colorBlack ), styleThick | ParamStyle("Style") |
GetPriceStyle() );
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