Daily Price Limit: The Daily Price limit is the maximum price advance or decline from the previous day's settlement price permitted during one trading session, as fixed by the rules of an exchange.
Exchange: A central marketplace with established rules and regulations where buyers and sellers meet to trade futures and options contracts or securities. Exchanges include designated contract markets and derivatives transaction execution facilities.
Low: Low is the lowest price of the day for a particular futures or options on futures contract.
Volatility: Volatility is a statistical measurement of the change in price of a futures contract, security, or other instrument underlying an option over a given time period.
Volatility is one of the most important factors in an option's price. It measures the amount by which an underlying asset is expected to fluctuate in a given period of time. It significantly impacts the price of an option's premium and heavily contributes to an option's time value. In basic terms, volatility can be viewed as the speed of change in the market, although you may prefer to think of it as market confusion. The more confused a market is, the better chance an option has of ending up in-the-money. A stable market moves slowly.
Volatility measures the speed of change in the price of the underlying instrument or the option. The higher the volatility, the more chance an option has of becoming profitable by expiration. That's why volatility is a primary determinant in the valuation of options' premiums. There are options strategies that can be used to take advantage of either scenario.
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Naked options trading is very risky - many people lose money trading them. It is recommended contacting your broker or investment professional to find out about trading risk and margin requirements before getting involved into trading uncovered options.