Understanding the quantities and lots is crucial for making informed decisions in the dynamic world of stocks and trading. For example, Nifty requires 25 units for one lot, Midcap Nifty requires 50, Bank Nifty 15, Fin Nifty 25, and Sensex 10 units per lot. A PHP code can be designed to simplify this process by first asking the trader for the amount they wish to invest. Next, it will prompt them to select a specific trade type, such as Nifty or Finnifty. The code will then calculate the number of lots that can be purchased by dividing the investment amount by the quantity per lot, rounding down to the nearest whole number, and displaying the result, thereby aiding traders in making precise and efficient trading decisions.