In about 6 hours we will switch to the new hard fork 20 (Source+Timer HERE).
We will go from the old 'bandwidth' system to a resource credits system (RC's).
The amount of Steempower you have dictates how much RC's you can use on the Steem blockchain.
Every action on the blockchain will consume RC's (example: voting, posting, commenting, transacting).
The amount of RC's per different action is not fixed and can change over time. It's a decentralised free market system. It will find balance within a week according to Steem Inc.
Nobody knows 100% sure what actions will cost right after the hard fork hits and therefor I recommend you take it a little bit slow at first just to make sure you don't drain all your RC's straight away by accident.
Example: Let's say commenting a second after the hard fork cost an enormous amount of RC's for Reason X and doing the same action tommorow cost way less because the system found a much better balance (RC cost) for this action.
RC's just like bandwidth replenish over time.
I expect if you have decent amount of SP (and therefor RC's) you don't have to worry much about all this but if you have little SP I would recommend you not go too heavy after the hard fork hits incase you will drain your RC's to fast.
6 hours to go! Pretty exciting.
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