Calculating the profit/loss that correspond to one pip value (problem with pairs with Yen as a quote like USDJPY)

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Hello,


I already opened a similar post on the subject but we got lost in a long conversion, so I preferred to open a new post so that the problem and the solution (if exists) remain clear.


Here is the problem:


I want to know the profit/loss corresponding of the movement of one pip (0.0001 for Forex pairs except for pairs with JPY, where it is 0.01) when I invest 20 euros with a leverage of 100.



Here is the solution for AUD / USD (it should be correct - given here: https://www.mql5.com/en/forum/429231):


invest_for_the_trade_in_euros = 20 (euros)

invest_for_the_trade_in_base_currency = 29.25 (AUD)



margin_for_a_lot = nb_of_units_for_a_lot / leverage = 100 000 / 100 = 1000


fraction_of_the_invest_compared_to_margin = 29.25 / 1000 = 0.02925 = 0.02 (we round DOWN because we can only buy with a max granularity of a microlot)


profit_loss_value_of_1_pip_movement_in_quote_currency (USD) 

                                                             = price_of_the_pair * 1pip * nb_of_units_boughts_with_the_leverage

                                                             = close * 0.0001 * (100000 * 0.02)

                                                             = 0.69 * 0.0001 * (100000 * 0.02)

                                                             = 0.139 (USD)

                                                             = 0.136 (EUR)


Here is the solution for USD / JPY (I don't think it's correct):


invest_for_the_trade_in_euros = 20 (euros)

invest_for_the_trade_in_base_currency = 20.41 (USD)



margin_for_a_lot = nb_of_units_for_a_lot / leverage = 100 000 / 100 = 1000


fraction_of_the_invest_compared_to_margin = 20.41 / 1000 = 0.02041 = 0.02 (we round DOWN because we can only buy with a max granularity of a microlot)


profit_loss_value_of_1_pip_movement_in_quote_currency (JPY) 

                                                             = price_of_the_pair * 1pip * nb_of_units_boughts_with_the_leverage

                                                             = close * 0.01 * (100000 * 0.02)

                                                             = 133.2 * 0.01 * (100000 * 0.02)

                                                             = 2664 (JPY)

                                                             = 19.58 (EUR)


As you can see, from this calculation, it appears that 1 pip movement on the USDJPY pair equates to a profit_or_loss of 19.58 euros, which is a lot!

I am almost certain there is something wrong in my calculation, but I cannot find out what.


Any idea ?


Thanks a lot


Aymeric



p.s: I am doing this effort of calculations because I think it's important but I am wondering if there is not a tool (online) that exists and do exactly this, so please tell me if you know one

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