Swap Charges

 
Can someone better explain swap charges to me?  For example, if my overnight swap charge is 12 points does that mean 12 percent is charged? Is that charged every night or is it a 1 time charge say if I hold a position for a week or more?
 
CanadianKodiak:
Can someone better explain swap charges to me?  For example, if my overnight swap charge is 12 points does that mean 12 percent is charged? Is that charged every night or is it a 1 time charge say if I hold a position for a week or more?
You can find this info on the instrument specification in MT4/5 >> View >> Marketwatch >> Symbol >> (right click) Specifications.