The "regular" chart has them, and I need them to remove the default currency sign. I need to use the StockChart because I need the Navigator feature.

Display Volume data, on 2nd y-axis (already possible) BUT this 2nd axis needs to be scaled down to bottom x% of vertical.

Most useful StockCharts support display of pricing info (OHLC) up top, and volume below. Example here 

• To support this as minimum, the existing functionality of adding multiple datasets, and 2nd dataset being shown against 2nd y-axis, but that 2nd y-axis needs to be able to be scaled down to bottom part of chart (e.g. bottom 1/3), as per example. show show column volume underneath OHLC pricing.
• Alternatively, and much more useful, and one some competitors do, is to support multiple rows of the chart. This allows presentation of correlations of data, e.g. price & volume, or other. In this case, the volume chart would be on 2nd row, but this functionality would allow MUCH more usefulness.
• Both these solutions, with existing navigator, make this a typically useful StockChart.