J
Johnnybmoto
Rock Star
Silver Level
Your bankroll is all the money you're willing to use for poker, not just what you have on a specific site. That includes money still in your wallet or bank. If you consider the money on each site as a separate bankroll, you can end up with some ludicrous situations. For example, if I have $1000 on site A and use a 20x buyin guideline for ring games, then assuming I buy in for the full amount, I can play NL50. But on site B, if I have $50 there and use the same 20x ratio, I can only play NL2. That's ridiculous since I'm the same person no matter which site I play on. In this example, I have one roll, not two. It's $1050, and I am adequately funded to play NL50 on either site.
This is only true if you have the means to get money from one site to the other at a moments notice.