Following the near 1,000-pt fall in the last three days, the market mood has turned bearish. Further, unwinding of positions by banks and brokers cannot be ruled out today.A complete recovery possible only if the Sensex is able to cross 13,160-13,370 resistance zone. On the downside, a move below yesterday's low could see the index seek support around 12,450 levels.The index is likely to face resistance around 13,260-13,340-13,425 levels, while on the downside the index may find support around 12,730-12,650-12,565 levels.