The stock of Chennai Petroleum Corporation gained 4.5 per cent with good volume on Tuesday, breaking above a key resistance level of ₹392. Since taking support at around ₹65 in March 2015, the stock has been on a long-term uptrend. Medium-term trend is also up for the stock. In February, the stock encountered a key resistance at ₹392 and started to move sideways in a narrow band between ₹360 and...