When Mercury is in Leo in a chart, it provides the native with superior planning skills. Such a native will always like to work in an quiet and wise way. But he/she can be magisterial in approach and very willful. The native will be communicative in a boastful and old-fashioned way, with a scope to show off. However, he/she will come up with big ideas at times, and will be highly resolute and practical. The native will be highly excited, have immense psychic power, and have excellent might of concentration, chiefly when studying. His/her oration can be very theatrical. When Mercury transits the fifth house in a chart, it may influence the native to take more risks and make some kind of gambling instinct to him. Being the house of affection, Mercury will create an skill to communicate to his/her companion in a very tender manner. The person will be attracted to leisure pursuits that challenge the thinker. Well-positioned Mercury will endow the native with a lot of courage and support him/her gain defined objectives.