Go to Dr. Bretts BLog and read how to use pivot points to assist you in swing trading - he does a good job of explaining it. I'll try to put up a couple of examples later.
For now here is how you compute a pivot model.
The Pivot point is simply the previous period's PP = (high+low+close)/3. The previous period can be an hour, day, week, month, year - whatever you want it to be depending on your time frame - when I day trade I use the previous day's values as do most traders.
Then you compute R1, R2, and R3 which are the resistance points. R1 = 2*PP - the low of the previous period. R2 = PP + (previous period high-low). R3 = R1 + (previous period high-low).
Then you compute S1, S2, and S3 which are the support points. S1 = 2*PP - the high of the previous period. S2 = PP - (previous period high-low). S3 = S1 - (previous period high-low). And that's how they are computed.
Now go read Dr. Brett and find out how to use your new found knowledge.