The FTSE 100 has been trading within a sideways range, recently hitting a one-month low of 8,183 before rebounding to 8,266, where the 55-day SMA serves as resistance. A breakout above 8,279 could target the 8,335-8,336 resistance zone, while a drop below 8,183 may lead to further declines towards the September low of 8,153.