The next 30 days could be a "turning point" for oil prices, a top commodities trader told CNBC Monday, adding that the price of light, sweet crude could soon fall to $85 a barrel.

West Texas Intermediate broke a key technical level when it recently closed below $95 a barrel, said Richard Ilczyszyn, senior market strategist at Lind Waldock. The close below that level "opens the window" for another $10 to the downside, he explained. Therefore, he thinks $85 to $95 is the new established range.