Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Margin account: how to calculate the stock price that might trigger a liquidation of positions?
Thanks to this youtube video I think I understood the required calculation. Based on following notation: then the formula to find x is: I found afterwards an example on IB site (click on the link 'How to Determine the Last Stock Price Before We Begin to Liquidate the Position') that corroborate the formula above.