Here is a simple Amibroker AFL code snippet which tracks the last trade price with a dashed horizontal line at LTP. It could be useful for the people who wants to know where the current market price is trading relative to their support/resistance/some other reference levels.
Simple Control is enabled to change the line color and style. To Access the control right click over the charts and goto parameters to change the required parameters.
Amibroker AFL Code Snippet for Price with LTP Marker