Leverage and margin: how much of the trade is yours

Leverage is a ratio. It compares the full size of the position to the deposit the broker sets aside. At 1:100, the broker locks one hundredth of the position value as margin. At 1:500, it locks one five-hundredth. The position itself does not change. Only the amount held back from your account changes.

Start from the chart. Suppose EUR/USD is near 1.0850 and you want one standard lot. The position value is about ₱6,184,500. At 1:100, the margin is ₱6,184,500 divided by 100, which is ₱61,845. At 1:500, the margin is ₱6,184,500 divided by 500, which is ₱12,369. The ratio you pick sets the margin, and nothing else does.

Margin is not a fee and it is not a cost. It is your own money, held aside while the trade is open. When you close the trade, the margin is released back to your available balance, minus any loss or plus any gain. It stays yours throughout, but you cannot use it for another trade while it is locked.

The margin number can differ between brokers. Some round it up, some add a small buffer, and some use a slightly different exchange rate at the moment you open the trade. Treat the figures here as worked examples, not as a live quote from any broker.

The pip value is set by the position size, not by the leverage. On one standard lot of EUR/USD, one pip is about ₱10.85 whether your leverage is 1:100 or 1:500. The chart moves in pips. Your profit or loss moves with those pips at the same rate per pip, regardless of which leverage you chose.

This is where the two numbers separate. Leverage changes the margin, which is the deposit held back. It does not change the pip value, which is the rate at which the trade gains or loses. A 50-pip move against one standard lot is a loss of 50 multiplied by ₱10.85, which is ₱542.50. That loss is the same at 1:100 and at 1:500.

The margin only looks small because the position is large. At 1:500, ₱12,369 holds a position worth ₱6,184,500. A 100-pip move against the position is a loss of ₱1,085. That is close to a tenth of the margin. A move of that size can happen in a single session on EUR/USD, and it does not need a news event to do it.

A common mistake is to read a small margin as free money. The margin is small because the leverage is high. The risk per pip is unchanged. If you size the trade from the margin the broker asks for, you are sizing it from the wrong number.

Work backwards from the loss you can accept. Decide the amount of money you are willing to lose on this trade if the chart goes against you. Call that your risk amount. Then decide how many pips you will allow the price to move against you before you close the trade. That is your stop distance.

Divide the risk amount by the pip value to get the position size. Suppose you are willing to lose ₱500 and your stop distance is 50 pips. At ₱10.85 per pip on a standard lot, ₱500 divided by ₱10.85 is about 46 pips. That is less than your 50-pip stop, so one standard lot is too large. You would need a smaller position, such as a mini lot, where the pip value is about ₱1.085.

The leverage you choose then sets the margin for that smaller position. If you trade a mini lot at 1:100, the position value is about ₱618,450 and the margin is about ₱6,184.50. The margin fits your account, and the risk per pip fits your plan. Leverage did not decide the size. Your risk amount did.

A bigger position does not mean a bigger account. It means a bigger pip value, and therefore a bigger loss for the same chart move. The account grows from keeping losses small, not from holding the largest position the margin allows.