Working out position size

A chart shows price in the quote currency, which for EUR/USD is the unit priced second in the pair. The distance from your entry to your stop is counted in pips, not in peso. A pip is the smallest standard move on most pairs, and on EUR/USD around 1.0850 it is the fourth decimal place. If you enter at 1.0850 and place your stop at 1.0830, the distance is 20 pips, whatever the exchange rate does to the peso value of those pips.

The peso amount you are willing to lose is fixed before the trade. The pip distance is fixed by the chart, where your reason for the trade stops being true. Those two numbers move independently. If you convert your risk into pips first, you are guessing at a stop level that the chart did not give you. If you convert your stop into peso first, you are guessing at a loss the account did not agree to.

Keeping the stop in pips separates the market decision from the money decision. The market decision is where price would prove you wrong. The money decision is how much of the account that proof is allowed to cost. Position size is the only number that connects them, and it is the last one you calculate.

One pip on one standard lot of EUR/USD is 10 units of the quote currency. At a rate of roughly ₱58 to the unit, that is about ₱580 per pip on a standard lot. A mini lot is one tenth of that, so about ₱58 per pip. A micro lot is one hundredth, so about ₱5.80 per pip. The lot size sets the peso value of each pip before you know your final position size.

That is why the same stop distance can cost very different amounts. A 20-pip stop on a standard lot risks about ₱11,600. The same 20-pip stop on a micro lot risks about ₱116. The chart did not change. The account balance did not change. Only the pip value changed, and it changed because the lot size changed. This is the step where beginners lose track of the arithmetic.

The conversion rate from the quote currency to peso varies between brokers and can move during the day. The figure of ₱58 is an example, not a fixed rate. Your broker may quote a slightly different rate when it converts your profit or loss. That difference does not change the method. It only changes the final peso figure by a small amount, and the method still holds.

The division rarely lands on a size your platform accepts. If the calculation gives 0.029 lots, most brokers will not let you trade that. They allow steps, often 0.01 lots. You round down to the nearest allowed step, which in this case is 0.02 lots. Rounding down keeps the risk at or below the amount you chose. Rounding up would push it above, which defeats the purpose of choosing the amount in the first place.

The spread and any commission are charged on top of the stop distance. If your stop is 20 pips away and the spread is 1 pip, the market needs to move against you by 21 pips before the stop triggers. That extra pip is a real cost, and it comes out of the same risk budget. Some traders widen the stop by the spread when they calculate, so the money risked matches the money lost.

The SEC Philippines regulates brokers that offer these products to residents, and the rules on leverage, margin and permitted lot steps vary between firms. A broker may also round the peso conversion at its own rate. Because those details differ, the exact peso figure you calculate by hand may not match the figure on your statement. The order of the three numbers does not change. Risk in money, divided by stop distance in pips, divided by pip value, then rounded down.