The tech index, represented by the Nasdaq futures ($NQ_F), experienced significant downward movement, with a decline of 771.50 points from its Wednesday high. Analysts highlighted a critical support level at 409, which previously indicated a shift in market momentum when breached. The daily close level of 539 was also noted as significant, as the index maintained upward momentum following this point. The low recorded on the morning of October 31 was 543, suggesting that the market has been responsive to these key levels. Additionally, a target of 208 was mentioned for future movements in the index.