draw object on a chart

Hi, I wish to draw a line with the description stop in the object properties

The line should be drawn at price point y = x + tp. The x variable is calculated in my
Ea , tp will be a global variable set in the properties of the ea eg 150pips away.

Once price the close of price crossess the stop line the line should be deleted from the chart

Can some one help please

Kind regards

Most objects on the screen are positioned according to their time(X) and price(Y) values without too much trouble. The simplest is usually the best.