Do you still need help with this? .top and .left should give you comp-space coordinates. Is there parenting involved or anything else adjusting the text sizing/position? Can you share the expression you're using?

From looking at the code… I think you’d just need to change how foundlines works… After the inPoint is loaded, reset foundlines…    if ( currentlayer === null ) {        currentlayer = myComp.layers.addText("");    }    currentlayer.inPoint = tc;    //Add this line    foundlines = 0; } els...

Yeah, the weird thing about markers is you can make any changes to the marker value object you want… but it doesn’t take effect until it’s set back on the layer. If you’re dealing with a pre-existing marker, you can make due with your original code, but then adding  myComp.layer(1).Marker.setValueAt...