Is there a proper code for this example?

@set Player1CH00 - 200

{if Player1CH00>=200-193: High}
{if Player1CH00=192-190: Medium}
{if Player1CH00=189-180: Low}

Try this.

@set Player1CH00=200

{if Player1CH00>199: High}
{else: 
{if Player1CH00<190: Low}
{else: Medium}
}