I have read most of the BR topics and beginner stuff. I would like some further explanation on one thought. Lets just say that we are gonna play 5+1 SnG's. The rule of thumb seems to be 15+ buy-ins so that would be $90. I'm not supposed to lose more than 10% in one day. OK, I play one tournament and lose. Now my bankroll is below the 15+.

1)Do I make another deposit to keep my roll at 15+?

Same situation, I play and lose 1 tournament a day for the next 4 days. So including my day 1 loss I have now lost 5 buyins or $30. $90-30=60. Now I cannot play without risking more than the recommended 10%.

2)Do I now make another deposit to keep my roll above the level that prevents me from risking 10%.

I would hope that an ITM finish now and then would prevent these but I really don't understand the concept. Should I never let my br drop below the recommended 15+? Just looking for some further explanation.