Open any email from Simpler Trading.
Scroll down to the bottom of the email and click on the link:
"Update Subscription Preferences"
A web page will open.
Check off which subscriptions you want to change.
Click "Update My Preferences".
If you want to Opt-out of all Simpler Trading email communications, then click the link:
"Actually, I'd like to opt-out of all Simpler Trading email communications"