 The research conducted by Angel in the 1960 suggested that the glass forming ability, GFA, of isomeric compounds was related to their melting points. However, this has been challenged recently due to the discovery that some compounds with high melting points can also have high glass forming abilities. This paper examines the relationship between the melting point and glass forming ability of isomeric compounds and finds that the lower the melting entropy, the higher the glass forming ability. Furthermore, it is found that the viscosity of the compound increases as its melting entropy decreases, suggesting that the melting entropy plays a key role in determining the glass forming ability of a compound. This article was authored by Baokongren, Zijingli, Yenuizheng, and others.