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  Highlight the ending point on Y axis
Posted by techsoft on Jun-17-2015 19:32
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Attachments:
Hi Peter,

1.How to highlight the last ending point of moving averages and last trading point on Y-
axis with a thin rectangle box or with a light background color.?

2.How to make a little gap between graph and chart box end line?, because users might be
not able to see the last point.

please find the below image.



Thanks,

Techsoft
chart.png

  Re: Highlight the ending point on Y axis
Posted by Peter Kwan on Jun-18-2015 03:31
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Hi techsoft,

1. You can put marks at the y-axis at any values you like. For example,

#This is your main price chart. We save the returned XYChart object to $m so that
#we can add mark boxes to it
$m = $c->addMainChart(240);

#The value of the mark box = last close price
$lastPrice = $closeData[count($closeData) - 1];

#The mark box
$mark = $m->yAxis()->addMark($lastPrice, -1, $lastPrice, "arial.ttf", 8);
$mark->setMarkColor(Transparent, 0x000000, Transparent);
$mark->setBackground(0xffff99, 0x000000);

You can add more marks at other values, such as the last moving average value. For
example:

#This is the moving average line. We save the returned Layer object to $layer so that
#we can retrieve the data value
$layer = $c->addSimpleMovingAvg(20, 0x9900ff);

#The value closest to the right side of the chart
$lastValue = $layer->getDataSet(0)->getValue($layer->getNearestXValue($c-
>getWidth()));

#Add mark as usual
$mark = $m->yAxis()->addMark($lastValue, -1, $lastValue, "arial.ttf", 8);
$mark->setMarkColor(Transparent, 0x000000, Transparent);
$mark->setBackground(0xff99ff, 0x000000);


2. To create a gap, you may add an extra valid timestamp with no OHLC and volume
data. For example:

#Add an extra timeStamp equal to the last timeStamp. This will create a gap.
$timeStamp[] = $timeStamp[count($timeStamp) - 1];


Hope this can help.

Regards
Peter Kwan

  Re: Highlight the ending point on Y axis
Posted by techsoft on Jun-19-2015 18:37
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Attachments:
Hi Peter,

Thanks for your reply, now it is highlighting the last close price on the axis in a label  but
it cuts off the last decimal value. I have tried some solutions from the previous posts but
not working . And i want to show the values behind the highlighted label, now its hidden.

Also how to mark last candlestick with yellow background.


Thanks,

Techsoft
chart2.png

  Re: Highlight the ending point on Y axis
Posted by Peter Kwan on Jun-20-2015 06:29
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Hi techsoft,

The last decimal value falls outside of the chart. To display longer labels, you may
increase the right margin using FinanceChart.setMargins.

http://www.advsofteng.com/doc/cdphp.htm#FinanceChart.setMargins.htm

For example:

$myFinanceChart->setMargins(40, 30, 60, 35);

The axis mark will cause labels overlapping with it to be removed. If you still want the
labels, you may try to add a textbox at the axis position instead of a mark. For example:

..... create chart as usual .....

#After configuring the entire chart, auto-scale the axis, so that we can determine
#the axis scale
$myFinanceChart->layout();

$mark = $m->addText($m->getPlotArea()->getRightX(), $m->getYCoor($lastPrice),
$lastPrice, "arial.ttf", 8, 0x000000, Left);
$mark->setBackground(0xffff99, 0x000000);


To add a yellow rectangle, you may use add a layer that uses rectangular symbols, such
as a box-whisker layer. For example, the following code adds a box-whisker layer with
only one box at the last position, with the box top and bottom being the highData and
lowData:

$boxTop = array_pad(array($highData[count($highData) - 1]), -count($highData),
NoValue);
$boxBottom = array_pad(array($lowData[count($lowData) - 1]), -count($lowData),
NoValue);
$layer = $m->addBoxLayer($boxBottom, $boxTop, 0xffff00);
$layer->setDataGap(0);

Hope this can help.

Regards
Peter Kwan