Margin Call Price when Short Selling Calculator
A Margin Call occurs when the value of an investor's margin account falls below the broker's required amount.

An investor's margin account contains securities bought with borrowed money (typically a combination of the investor's own money and money borrowed from the investor's broker).

A margin call refers specifically to a broker's demand that an investor deposit additional money or securities into the account so that it is brought up to the minimum value, known as the maintenance margin.
$Margin\ Call\ Price\ =\ {Stock\ Price}\times(\frac{1+(\frac{Initial\ Margin\%}{100})}{1+(\frac{Maintenance\ Margin\%}{100})})$