Broadly speaking: There are very few personality types suitable for trading, primarily those with I+T traits. Some E+T traits can also be considered. F traits are generally unsuitable for trading because they are highly emotional and easily influenced by rising and falling prices, leading to buying high and selling low. E+F traits are the least suitable for trading. Sub-situations: Personality types are not static. Some people can transition from F to T, but this is generally only possible if they are not particularly F-type. Those with high F concentrations find it difficult to make the transition.