I have a little problem to understand how you count CTR and why in this way in e-mail marketing. Every definition that i know and i found says that CTR is ratio of clicks and views. In system i see that your CTR is ratio of clicks and sends and ratio of clicks and views are CTOR. But on Web push analytics i see CTR which is ratio of clicks and views. Please standardize this or for example delete CTR indicator because in my opinion is useless in e-mail marketing analytics. The real indicator that shows the effective of the e-mail is CTOR.