Because measurement for transaction volume might be &quot; units &quot; , a second y axis is introduced in chart Type 3 and Type 4. The price axis is shown on the right side and the volume axis on the left side.
因为交易量的度量可能是“单位”的，第二个 y 轴被插入到图表类型 3 和类型 4 中。价格轴显示在右侧，量轴显示在左侧。