Technicals-cbot soybeans may retest support at $9.77-1/2 SINGAPORE, Dec 3 (Reuters) - CBOT soybean January contract SF25 may retest support at $9.77-1/2 per bushel, driven by a wave C. This wave started at $10.13. It may end around... https://t.co/zrJtb09RWY https://t.co/fdL7Q2wygA.