Plot a red or blue dot in the open and close of a trade

Hi, 

As well as the Mt4 can draw the trade if you drag & drop your operation into the chart, showing some arrows connected by a line, I want to be able to get blue and red dots with this instructions:

-  Blue dot when buying

-  Red dot when selling

For each operation, then, we'll have two dots:

-  When entering long:  open blue, close red

-  When entering short:  open red, close blue 

To show what I want, nothing better than showing some examples:

https://www.dropbox.com/s/wafptin7hqe0rmk/0012%20gbpusd%201h%20-%20140311.png?dl=0

https://www.dropbox.com/s/2bl6ws41b0g3l0h/130613%20EURCHF.gif?dl=0

https://www.dropbox.com/s/hp1gmacw08ajscf/130606%20GBPUSD.gif?dl=0

I really don't mind if it is a EA, an Script, or whatever, but at this point, I draw those dots manually with Gimp, and I would like to know if it is possible Mt4 to draw those dots for me.