You can easily install SoftOne pixel, using "Header and Footer Scripts" wordpress plugin.

First, let's install the plugin:

• Log in to your WordPress site.
• Go to Plugins > Add new
• Search for "Header and Footer Scripts".
• Click "Install Now" and activate the plugin.

Now go to Settings >

Paste your SoftOne pixel script in to "Scripts in header" box and Save.

That's it! you are ready to go.