Copper gained for second straight day on Wednesday. Copper ended the day at Rs 343.20 on 8 October 2015 against 343.35 per kg on 7 October 2015. On Wednesday trading gains are expected to get resisted at Rs 346.95 and 341.80 per kg. Supports for Copper is at Rs 339 and Rs 337 per kg. The high for Copper on Tuesday was at Rs 345.90 per kg, and a low of Rs 339.70 per kg was tested. Open interest was at 17855 on 7 October 2015 against on 15918 on 6 October 2015.