Flat or slightly gap down opening expected in banknifty. After opening if banknifty starts trading and sustain above 49550 level then possible upside rally upto 49950+ level in today's session. Major downside expected if banknifty not sustain above level and starts trading below 49450. This downside can possible of 400-500+ points. Downside 49050 level will act as a strong support for today's session.