Commodity trading is trading in derivatives and commodity spot. There are two different categories of commodities we have to trade: Agricultural commodities and non-agricultural commodities
Agricultural Commodities: These include grains and oilseeds (soybean, chana, corn, groundnut etc.), livestock, dairy products, bio-fuels etc.
Non-Agricultural Commodities: These include Metals like gold, silver, copper etc.
Also, there are 24 commodity exchanges in India and three national level commodity exchanges to trade in all permitted commodities.
They are Multi Commodity Exchange of India Ltd, Mumbai (MCX), National Multi Commodity Exchange of India Ltd, Ahmedabad (NMCE) and National Commodity and Derivative Exchange, Mumbai (NCDEX)
When you buy futures, you have to pay a fixed percentage of the cost. This is known as the margin. You can start with commodity trading with a minimum of Rs 5000.
For example, if you buy a gold futures contract at Rs. 63,000 per 100 gm, the margin for gold set by MCX is 3.5%. So, you end up paying Rs. 2,205—also called margin. The next day, the price of gold rose to Rs. 64,000 per 100 gm. Then, Rs 1,000 (Rs 64,000 - Rs 63,000) will be credited to your account.
The sales tax is applicable only if it results in delivery. But if the trade is squared off then no sales tax is applicable. A better decision would be to initially trade in stock futures before opting for commodity futures.