Yes you can!
When you are logged, go to the forum page and click on the far right icon in the grey tool-bar (with the little drop down arrow next to it).
From the drop down select 'Edit Profile'. You will then be able to edit your profile.
By default your nick name will be the same as your Full name.
Change your nickname to anything you like for example to 'Long-term investor' and then click 'save' at the bottom of the page.
From now on all your posts as well as your profile will only be related to your chosen nickname but also all your old posts will be connected to your nickname.
See attached screen-shots for clarification.
RRG discussion and support forum
This forum is dedicated to Relative Rotation Graphs and is your resource for all your questions, suggestions and feedback. We love to hear from you. The forum has several sub-categories. The FAQ is a closed forum where you can read answers to some most Frequently Asked Questions on RRG. RRG General is the area where you can post and get answers with regard to general RRQ questions or issues. RRG on partner systems is where you will find and can ask any questions specifically geared towards the implementations of RRG by our partners