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<SPAN
class=810180007-16112003>Gordon,
<SPAN
class=810180007-16112003>
<SPAN
class=810180007-16112003>//--Indicator-End-- is notation Tomasz uses in
his built in codes. You do not need it in your custom code. the // marks the
rest of the line as notation and is ignored by AB.
<SPAN
class=810180007-16112003>
To plot a price
chart there is probably no need to use PlotOHLC, simply just use Plot(c,"<FONT
face="Courier New" size=3>Custom price chart", colorBlack,
styleCandle);
<FONT
face="Courier New" size=3>
<FONT
face="Courier New" size=3>Since candles use OHLC data AB "Knows" to draw that
data...
<FONT
face="Courier New" size=3>
<FONT
face="Courier New" size=3>Sorry, I am no help with _Trace...I have never used
it.
Regards,
Jayson BTW, the
first thing I set out to do was find the first and last visible bars. That
code may come in handy for a few people. The gist of my question is
understanding the debug output in the code below. First I paste the code,
then the debug output. The calls to _Trace are just meant to show if my
formulas for finding the first and last visible bars are
working.Question no #1: The output below was created by clicking "Apply"
in the indicator builder window. In the output, you'll see three
complete sets of the calls to the _Trace() function, with {EMPTY}
showing for the date values in the first one. I'm gussing the {EMPTY}
has to do with the use of Ref() in the second two statements, and that
the -1 and +1 offsets yield invalid results on the very first pass through
this indicator. This made me a little nervous -- and only a little -- why
are there three calls, and could I ever wind up getting unexpected results
if I were using the return value from one of those calls in other code vs.
just printing it to debug?Question no #2: I tried putting the
//--Indicator-End--comment above the calls to _Trace() to
prevent AB from having to execute the code for every bar -- which it didn't
anyway, apparently, since there were only the three calls to it. AB seems to
be "smart" about how often it has to execute indicator code. However, is
there "layman" use for "//--Indicator-End--" ?THE
CODE:PlotOHLC(Open, High, Low, Close, "Custom price chart", colorBlack,
styleCandle); GraphXSpace=10;// -- Arbitrary code to test
drawing of shapes in this indicatorPlotShapes(IIf(DayOfWeek()==1,
shapeUpArrow, shapeNone), colorGreen, 0, Low, Offset=-15);// --
Let's calculate the first and last visible bars, and
output// the results using _Trace()_TRACE("The lowest
low of the visible bars is: " +WriteVal(LastValue( Lowest(
IIf(Status("barvisible"), L, 99999))))); _TRACE("The first visible date
is: " + WriteVal(ValueWhen(Status("barvisible") AND NOT
Ref(Status("barvisible"), -1), DateTime(), 1), formatDateTime
));_TRACE("The last visible date is: " +
WriteVal(IIf(Status("barvisible") AND
BarIndex()==LastValue(BarIndex()),ValueWhen(BarIndex()==LastValue(BarIndex()),
DateTime(), 1),ValueWhen(Status("barvisible") AND NOT
Ref(Status("barvisible"), 1), DateTime(), 1)), formatDateTime ));
Output (3 sets of calls):[2360] The lowest low of the visible
bars is: 99,999.000[2360] The first visible date is: {EMPTY}[2360] The
last visible date is: {EMPTY}[2360] The lowest low of the visible bars
is: 31.370[2360] The first visible date is: 5/14/2003[2360]
The last visible date is: 11/14/2003[2360] The lowest low of the visible
bars is: 31.370[2360] The first visible date is:
5/14/2003[2360] The last visible date is:
11/14/2003GordonSend
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