On the daily chart, the depth of the drop from the July 30 high of 4,498 ringgit suggests a reversal of the uptrend from the June 18 low of 3,251 ringgit
Brent crude futures for September fell 44 cents, or 0.6%, to $73.66 a barrel by 0432 GMT while US Texas Intermediate crude was at $71.62 a barrel, down 45 cents
Iran's main oil export terminal is located at the port of Kharg inside the Strait of Hormuz, a waterway less than 40 kilometres (25 miles) across at its narrowest point.