How to modify MVA dot?

How would I modify an simple moving adverage to only show one bar of its self on the chart regardless of its size?

for example:

If it is 14 periods long it will only show the current bar and appear as a dot.
If it is 200 periods long it will only show the current bar and appear as a dot.

http://i31.photobucket.com/albums/c3...m/MVADOT-1.jpg

bamben,

you may try having all older values than current read as empty, then they would not display. If it is just for visual purposes you could also try creating a graphic object.