A very useful website that I have discovered is www.acuxo.com out of England. On the site are graphics of individual acu points and all of the acupuncture channels plus much more.
For regular folks who want to practice some acupressure on themselves, this site can provide accurate information. Enjoy it , use it but do not try treating serious ailments on your own. Some professional guidance can save you a lot of time and suffering.
The point illustrated above is Nei Guan (inner gate) also called P6. The P stands for Pericardium which is also referred to as the Heart Protector and the 6 means it is the 6th point on that channel.
This point is between two tendons that run down the middle of the inside of your forearm. You can locate the point by laying your first three fingers across the forearm with the ring finger next to the biggest crease across your wrist.
P6 will be between the two tendons where your index will be laying.
This point is frequently used for stomach pain as well as nausea and chest pain. It is also used for motion sickness.
You can find acuxo's information on P6 here:
http://tinyurl.com/26sjbe