Staking power is nothing but its a power which denotes that in how much percentage you can upvote to an articles . Stacking power depend upto number of free coins available . Suppose you have 60 coins and you have not upvoted any article in betting mode you stacking power is 100% but when you vote on any article with available coins your stacking power will decrease but don't worry it will be increase automatically when your betting period over.