Hi eskimo,
IMHO, Layers is one of the most useful (and perhaps unique to stock
charting) features of AB's charts. However one thing isn't intuitively
clear -- the numbering of them.
First, in your PlotShapes argument, there is a provision for specifying a
layer (0 or Default Layer is the default). The PlotShapes
arguments are: PlotShapes(shape, color, layer, yposition,
offset). Now the trick is to know what layer number you assigned
your signals to -- Layers 1 thru 5 are already defined by AB as Default,
Intraday, Daily, Weekly, and Monthly. So as you specified 2 in your
PlotShapes code, it would only show up on Intraday charts (unless you have
deleted the stock layers) or when that layer is active. NOTE:
It's not the name you give the layer, but it's number (like watchlists). Try
figuring out the actual number of the watchlist you named 2 (I have mine both
numbered and named, in my instance 21 - Arrow Signals). Actually I have other
layers for long and short (i.e., Trade Entry), and sell and cover (Trade Exit)
for some charts as well; but for testing code, all Arrow Signals works for me
usually. Now verify the number, put that number in your plotshapes code,
check the box next to that layer and your signals should appear.
Go wild with layers -- you can put an amazing amount of info on your
charts: Text (for Trade notes, commentary, events, news, earnings dates,
dividend dates, etc.), Lines ( for Trade entries, Trends,
S&R, fibs, etc) (and sorted by different timeframes) and more and
still not clutter up your chart because layers allows you to hide or expose as
you wish. Of course, you have to use parameters to hid/expose things like
MAs, or other afl drawn items, but not a big deal (tho it would be nice to
expose or hide all MAs at a click).
Have fun.
Peace and Justice --- Patrick
----- Original Message -----
Sent: Thursday, December 10, 2009 4:03
PM
Subject: [amibroker] layer number for
PlotShapes
Hi,
I have the following code to plot UP/DOWN arrows for
BUY/SELL. My question is how do I assign a layer number so that the arrows
only show up when layer number 2 is selected?
I created a layer called
"2" and it does not work.
Buy=Cross(MACD(),
Signal());
Sell=Cross(Signal(), MACD());
shape = Buy * shapeUpArrow +
Sell * shapeDownArrow;
Plot( Close, "Price", colorBlack, styleCandle
);
PlotShapes( shape, IIf( Buy, colorGreen, colorRed ), 2, IIf( Buy, Low,
High ) );
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