sclass TickerGraphPainter extends AbstractTickerPainter {
  settable TickerSequence ticker;
  
  Color shortColor = java.awt.Color.blue;
  Color longColor = java.awt.Color.yellow;
  
  BufferedImage render() {
    verticalRange(doubleRange(ticker.minPrice(), ticker.maxPrice()));
    var timeRange = ticker.timeRange();
    horizontalRange(doubleRange(timeRange.startTime().unixDate(), timeRange.endTime().unixDate()));
    
    // Make black image
    var img = blackImage(w, h);
    var g = img.createGraphics();
    
    drawPercentLines(g);

    // Draw ticker graph
    
    var xRange = roundToIntRange(xRange());
    for (int x = xRange.start; x < xRange.end; x++) {
      int idx1 = ticker.indexOfTimestamp(xFromScreen(x));
      int idx2 = ticker.indexOfTimestamp(xFromScreen(x+1));
      var seq = ticker.subSequence();
      int y1 = iround(yToScreen(seq.maxPrice()));
      int y2 = iround(yToScreen(seq.minPrice()));
      drawLine(g, x, y1, x, y2, Color.white);
    }
    
    ret img;
  }
}