The Sensex is likely to open on a positive note, and trade with a positive bias for most of the trading day. It seems that the index is headed towards the 12,100 level in the short-term. A break of 11,400 could abrupt the upmove.For today's trading, the Sensex is likely to face resistance around 11,610-11,620-11,630 levels. On the downside, the index may find support around 11,535-11,525-11,515 levels.