To avoid the liability issue, you may want to check the legal folks but the key thing you have to do is to make it clear that you are not offering actionable advice but providing basic information on your topic and providing a context for discussion, sharing with folks with like interests.
If you look at some of the disclaimers (usually linked to in the footer) on any financial or medical site you will get the idea. For example, WebMD calls theirs "Terms and Conditions of Use."
Terms and Conditions of Use
PLEASE READ THESE TERMS AND CONDITIONS OF USE CAREFULLY BEFORE USING THIS SITE.
By using this site, you signify your assent to these Terms and Conditions. If you do not agree to all of these Terms and Conditions of use, do not use this site!
WebMD, LLC. ("WebMD") may revise and update these Terms and Conditions at any time. Your continued usage of the WebMD website ("WebMD Site," or the "Site,") will mean you accept those changes.
The Site Does Not Provide Medical Advice
Use of Content
Liability of WebMD and Its Licensors
On my financial site I have a very similar statement. I still express strong opinions but in addition to my disclaimer statement I regularly point out that everyone's situation is different and readers need to make decisions based on their particular circumstances with the advice of their own accountants, lawyers, and financial advisers. Keep this in mind and you should be OK.
The ones who get in trouble are those who do stupid things like promising people that they can make $1000.00 a day if they just buy and follow the advice in their $2000.00 program.