Feroiu Laurentiu

Hello, I have the following problem. When I move the mouse along the line in the chart, the values displayed in the tooltip are wrong. Please see the attached picture. I do not set the ToolTipFormat property on the chart, I do not subscribe to the GetTip event to display a custom value(although I've tried, with no success, the values received are also wrong ). Can you give me a hint , as I have no clue about what I am doing wrong, or I'm not doing. Thank You, Feroiu Laurentiu