Finance Chart Custom Symbols

perldemo\financesymbols.pl
#!/usr/bin/perl

# The ChartDirector for Perl module is assumed to be in "../lib"
use File::Basename;
use lib (dirname($0)."/../lib") =~ /(.*)/;

use FinanceChart;

# Create a finance chart demo containing 100 days of data
my $noOfDays = 100;

# To compute moving averages starting from the first day, we need to get extra data points before
# the first day
my $extraDays = 30;

# In this exammple, we use a random number generator utility to simulate the data. We set up the
# random table to create 6 cols x (noOfDays + extraDays) rows, using 9 as the seed.
my $rantable = new RanTable(9, 6, $noOfDays + $extraDays);

# Set the 1st col to be the timeStamp, starting from Sep 4, 2014, with each row representing one
# day, and counting week days only (jump over Sat and Sun)
$rantable->setDateCol(0, perlchartdir::chartTime(2014, 9, 4), 86400, 1);

# Set the 2nd, 3rd, 4th and 5th columns to be high, low, open and close data. The open value starts
# from 100, and the daily change is random from -5 to 5.
$rantable->setHLOCCols(1, 100, -5, 5);

# Set the 6th column as the vol data from 5 to 25 million
$rantable->setCol(5, 50000000, 250000000);

# Now we read the data from the table into arrays
my $timeStamps = $rantable->getCol(0);
my $highData = $rantable->getCol(1);
my $lowData = $rantable->getCol(2);
my $openData = $rantable->getCol(3);
my $closeData = $rantable->getCol(4);
my $volData = $rantable->getCol(5);

# Custom data series should be of the same length as the OHLC data series
my $buySignal = [(0) x scalar(@$closeData)];
my $sellSignal = [(0) x scalar(@$closeData)];

#
# The following is just an arbitrary algorithm to create some meaningless buySignal and sellSignal.
# They are just for demonstrating the charting engine. Please do not use them for actual trading.
#

my $sma5 = new ArrayMath($closeData)->movAvg(5)->result();
my $sma20 = new ArrayMath($closeData)->movAvg(20)->result();

for(my $i = 0; $i < scalar(@$sma5); ++$i) {
    $buySignal->[$i] = $perlchartdir::NoValue;
    $sellSignal->[$i] = $perlchartdir::NoValue;
    if ($i > 0) {
        if (($sma5->[$i - 1] <= $sma20->[$i - 1]) && ($sma5->[$i] > $sma20->[$i])) {
            $buySignal->[$i] = $lowData->[$i];
        }
        if (($sma5->[$i - 1] >= $sma20->[$i - 1]) && ($sma5->[$i] < $sma20->[$i])) {
            $sellSignal->[$i] = $highData->[$i];
        }
    }
}

# Create a FinanceChart object of width 640 pixels
my $c = new FinanceChart(640);

# Add a title to the chart
$c->addTitle("Finance Chart with Custom Symbols");

# Set the data into the finance chart object
$c->setData($timeStamps, $highData, $lowData, $openData, $closeData, $volData, $extraDays);

# Add the main chart with 240 pixels in height
my $mainChart = $c->addMainChart(240);

# Add buy signal symbols to the main chart, using cyan (0x00ffff) upward pointing arrows as symbols
my $buyLayer = $mainChart->addScatterLayer(undef, $buySignal, "Buy", perlchartdir::ArrowShape(0, 1,
    0.4, 0.4), 11, 0x00ffff);
# Shift the symbol lower by 20 pixels
$buyLayer->getDataSet(0)->setSymbolOffset(0, 20);

# Add sell signal symbols to the main chart, using purple (0x9900cc) downward pointing arrows as
# symbols
my $sellLayer = $mainChart->addScatterLayer(undef, $sellSignal, "Sell", perlchartdir::ArrowShape(
    180, 1, 0.4, 0.4), 11, 0x9900cc);
# Shift the symbol higher by 20 pixels
$sellLayer->getDataSet(0)->setSymbolOffset(0, -20);

# Add a 5 period simple moving average to the main chart, using brown color
$c->addSimpleMovingAvg(5, 0x663300);

# Add a 20 period simple moving average to the main chart, using purple color
$c->addSimpleMovingAvg(20, 0x9900ff);

# Add candlestick symbols to the main chart, using green/red for up/down days
$c->addCandleStick(0x66ff66, 0xff6666);

# Add a volume indicator chart (75 pixels high) after the main chart, using green/red/grey for
# up/down/flat days
$c->addVolIndicator(75, 0x99ff99, 0xff9999, 0x808080);

# Append a 14-days RSI indicator chart (75 pixels high) after the main chart. The main RSI line is
# purple (800080). Set threshold region to +/- 20 (that is, RSI = 50 +/- 25). The upper/lower
# threshold regions will be filled with red (ff0000)/blue (0000ff).
$c->addRSI(75, 14, 0x800080, 20, 0xff0000, 0x0000ff);

# Output the chart
$c->makeChart("financesymbols.png");