I think trading is unpredictable job when it comes to having a customer, because sometimes you can have a day that have low number of customer and your profit ofcourse will be low, and you can not know if tomorrow will be a profitable day or the same. Also sometimes there is a day that there is many customers and the trading is good. Ofcourse you can have many profit when that day comes. Its just that you can't predict if you can have big income today or low income.
That's the legal system or trade. everyone who uses the trade will surely do so in the same way or they will experience the same thing. Because trade was concerned about the wants and needs of a person in every thing that exists in the world, that not everyone has the same taste. So, to address the matter then you should also expand your science in analyzing each of the goods and products that you will trade. Trading is not easy if you don't have essentially