How is market falling if DII buy > FII sell

I don't understand why is it happening? Until now starting Jan 1, FIIs have sold 19.1k Cr while DIIs have bought 20.3k Cr. Still the overall market is down. For dec, FIIs sold: 16.9k Cr, DIIs buy: 34.1kCr, Nifty down by 3% Can someone explain? Are retailers really that impactful?