Finance Chart Custom Symbols

The following is the command line version of the code in "cppdemo/financesymbols". The MFC version of the code is in "mfcdemo/mfcdemo". The Qt Widgets version of the code is in "qtdemo/qtdemo". The QML/Qt Quick version of the code is in "qmldemo/qmldemo".
#include "FinanceChart.h"

int main(int argc, char *argv[])
{
    // Create a finance chart demo containing 100 days of data
    int noOfDays = 100;

    // To compute moving averages starting from the first day, we need to get extra data points
    // before the first day
    int 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.
    RanTable* 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, Chart::chartTime(2014, 9, 4), 86400, true);

    // 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
    DoubleArray timeStamps = rantable->getCol(0);
    DoubleArray highData = rantable->getCol(1);
    DoubleArray lowData = rantable->getCol(2);
    DoubleArray openData = rantable->getCol(3);
    DoubleArray closeData = rantable->getCol(4);
    DoubleArray volData = rantable->getCol(5);

    // Custom data series should be of the same length as the OHLC data series
    double* buySignal = new double[closeData.len];
    double* sellSignal = new double[closeData.len];

    //
    // 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.
    //
    ArrayMath sma5Calculator(closeData);
    DoubleArray sma5 = sma5Calculator.movAvg(5).result();
    ArrayMath sma20Calculator(closeData);
    DoubleArray sma20 = sma20Calculator.movAvg(20).result();
    for(int i = 0; i < sma5.len; ++i) {
        buySignal[i] = Chart::NoValue;
        sellSignal[i] = Chart::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
    FinanceChart* 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
    XYChart* mainChart = c->addMainChart(240);

    // Add buy signal symbols to the main chart, using cyan (0x00ffff) upward pointing arrows as
    // symbols
    ScatterLayer* buyLayer = mainChart->addScatterLayer(DoubleArray(), DoubleArray(buySignal,
        closeData.len), "Buy", Chart::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
    ScatterLayer* sellLayer = mainChart->addScatterLayer(DoubleArray(), DoubleArray(sellSignal,
        closeData.len), "Sell", Chart::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");

    //free up resources
    delete rantable;
    delete[] buySignal;
    delete[] sellSignal;
    delete c;

    return 0;
}