To create a conversion pixel you need to go to the Sites tab button create a new site.
Then press save and you will see the menu where you can create a pixel.
To create JS pixel you need to do following important steps:
Choose Conversion Pixel in Pixel Type menu
Insert Pixel ID (can be a random number) and remember it.
Then press button Generate and you will the pixel in the HTML-code section.
So now you created the pixel, you can copy and place it on your web-site.
If you need img tag (not js) you can use the example below, but first you need to change:
<img src="https://px.adhigh.net/p/conversion.gif?syncs=default&site_id=1234&pixel_id=1234" width="1" height="1">
<img src="https://px.adhigh.net/p/conversion.gif?syncs=bsw&syncs_only=true" width="1" height="1">
After that you need to go back in the Site you created (press Edit Site button) and create Conversion Rule.
You can find instruction how to create Conversion Rule here.