Show N/A or custom text for NaN values in OHLC

Is it possible to show custom text on hover for OHLC financial charts (similar to bar charts text[])?
For example if I have missing / NULL values in the OHLC data the hover pop-up shows NaN.
I want to overwrite NaN with ‘N/A’ in the pop-up:


You can use the text attribute to customize your graph’s hover text as in