The most effective global cotton fluctuations is that of long run fluctuations which is due mainly to a lot of various factors; for example; long run demand variations due to technological modifications in global cotton demand, excess global cotton production existing from both vertical and horizontal developments, scientific and technological innovations that affects cotton production economics,

variation in the main global hard currencies values, and finally variations in the main economic powers that affect global economic system structure.

For global cotton industry, it would be reasonable if one can assume that its development is mainly affected by demand that had existed in western Europe toward the Indian cotton, begun from the 14 th Century up to the 17 th century as a result of innovating the mechanical spindle which was called "Hargines Spindle" on 1364, demand on raw cotton had an upward price trend due to an increasing demand function.

At the beginning of the 18 th Century and also after innovating the Sow-Gin machine in ginning cotton process which was in 1793 and also after breeding new high qualities varieties of global cotton.

Prices began to fluctuate up and down until national American war had existed, which was accompanied by a big extension of American cotton production.

After this period global cotton prices tended to have an upward trend from 1898 to 1914, after the beginning of World War I, which had been ended by a big boom in cotton prices due to demand increasing trend and supply decreasing trend, as one of the results of this war, then prices tend to decrease from 1920-1921,then enhanced from 1922-1925 as a result of U.S cotton production decreasing as American cotton had been affected severely by ball-warm insect and after a slight reduction in cotton prices on 1926 to 1928,the big reduction in American cotton prices due to the great depression that existed in the United States from 1929 till 1933;this situation spread to the whole world.

Then global cotton prices enhanced in few consecutive years.

In 1939 War World II occurred which lead to a continuous upward trend in cotton prices had reached booms, most economists explain that this last period of cotton prices getting upward trends due mainly to governments interventions in cotton economies in most of the big states in both producing and consuming cotton.

By the end of World War II cotton prices tend to have downward trend from the mid of the fourties to the beginning of the fifties, then started to increase as a result of Korean War.