Advantage of price difference: fixed price difference, no commission, no slippage,

Europe and America 2, GBP US, Australia and US, US and Japan, US and Switzerland, US and Canada, Euro GBP 3, Gold 5, Crude Oil 6.

Agricultural products: cocoa beans -cc5, coffee -kc3, sugar -sb5 cotton -ct4 soybean -s2 wheat -w 2 corn C, soybean oil -bo2, etc.

Index: futures copper -hg6, crude oil/natural gas.

Dj- 10 of the Poole 500 Index, nd of Nasdaq Index Futures, Dj of Dow Jones, jni of Nikkei, hsi of Hong Kong Hang Seng Index, etc.