Changing the label of the axis ticks in event

[Yeray]

Hello,

So at this point you are using YValues.DateTime as some kind of categorizing setting so you can determine what axis to assign later (and you would also use it on the hypothetical OnGetCustomAxisLabel).
While this event isn't implemented, I think you still can achieve the same result inheriting TLineSeries (ie TMyLineSeries), add an extra property to your custom series (ie, IsDuration: boolean) and use it to store what kind of series is and assign the axis later depending on that property.