(Reuters) – Canadian stocks looked set to open higher on Tuesday, tracking gains in global markets after European Central Bank chief Mario Draghi said the bank was ready to act on deflation. The European Central Bank must be particularly watchful for any negative price spiral in the euro zone, Draghi said on Monday. The index was little changed on Monday as gains in financials were offset by weakness in Valeant Pharmaceuticals International Inc with investors reluctant to make big moves while the U.S. market was closed for the Memorial Day holiday.