How to do a dynamic tooltip in the XYChart Component

[Aiasa21]

I asked more or less the same here if it can help

XY Chart Tooltip - Is possible to use the if condition in the expression?

Good morning, I'm struggling trying to display the tooltip in an XY Chart basing on a condition. I would like to change the text depending on the value of a series property. In my case I have the "stato_lotto" property and I'm trying to do something like this: if( '{stato_lotto}' = 'NO', 'Posizione: [bold] {nomeTooltip}' + "[/] \n" , 'Lotto: [bold] {stato_lotto}' + "[/] \n" ) The tooltip is shown, but it doesn't change based on {stato_lotto} value. Is this approach wrong?