Readonly
Re-read the chart's switches and repaint.
Show a bar's readings and hold them. Null lets the row follow the latest bar again, as it does while the pointer is away.
Put a transient message at the right. error tints it.
error
Optional
The title: symbol, optional exchange, and the interval code. Changing a title already set clears the readings until the chart's primary data is next replaced, since the bars still on the chart are the previous title's.
Re-read the chart's switches and repaint.