Loss calculation does not match loss in backtesting MT4 - why? | Forex Factory

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Loss calculation does not match loss in backtesting MT4 - why?

  • #1
  • First Post: Nov 21, 2020 10:43am Nov 21, 2020 10:43am
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So daily swap eats 6.15 usd. Account is in usd. From jan 22 to feb 6 it has been 17 swaps.
There is no commision.
So my math is 6.15*17+52.5=157.05

but position loss is 175.48.

What am I missing?
I am not sure if swap usd per lot is changing based on usdjpy price. Maybe I should use different, not 6.15 ? How to calculate it if so?
  • #2
  • Nov 22, 2020 10:17pm Nov 22, 2020 10:17pm
Swap does vary with price.
6.15 may be today's value but you dont know what it was on Jan 22
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  • #3
  • Nov 24, 2020 1:28pm Nov 24, 2020 1:28pm
Quoting RedLineFred
Swap does vary with price. 6.15 may be today's value but you dont know what it was on Jan 22
Ok, so can you show the math how the loss is 175.48 ?
  • #4
  • Nov 24, 2020 9:27pm Nov 24, 2020 9:27pm
my comment was only to highlight that swap costs vary over time.
why your loss expected doesn't match that shown on MT4 could be due to a few reasons.
you show the specification which has a short swap cost of 8.077 so at a lot size of 0.79 this would equate to a cost per day of USD6.38 not the 6.15 you are using
also you don't say what your account currency is, as the swap costs are in USD whereas you may have a EUR account
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  • #5
  • Nov 25, 2020 10:17am Nov 25, 2020 10:17am
Quoting RedLineFred
my comment was only to highlight that swap costs vary over time. why your loss expected doesn't match that shown on MT4 could be due to a few reasons. you show the specification which has a short swap cost of 8.077 so at a lot size of 0.79 this would equate to a cost per day of USD6.38 not the 6.15 you are using also you don't say what your account currency is, as the swap costs are in USD whereas you may have a EUR account
How did you get 6.38 ? The position size calculator shows 6.15. So could be a bug?

Even using 6.38 I do not get the correct loss:

6.38*17+52.5 = 160.96

Account is in usd.
  • #6
  • Nov 25, 2020 11:32pm Nov 25, 2020 11:32pm
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Short swap is shown in the spec as 8.077 so at a lot size of 0.79 this would equate to a cost per day of USD6.38083

Entry Price - Exit Price = 0.069
Loss = (0.069*1000) * 0.79 = USD54.51

6.38083*17+54.51 = 162.98

Still as you say something is amiss. You sure this account doesn't have a Commission fee?
" check out The Traders Outpost "
  • #7
  • Last Post: Nov 26, 2020 1:29pm Nov 26, 2020 1:29pm
Quoting RedLineFred
{image} Short swap is shown in the spec as 8.077 so at a lot size of 0.79 this would equate to a cost per day of USD6.38083 Entry Price - Exit Price = 0.069 Loss = (0.069*1000) * 0.79 = USD54.51 6.38083*17+54.51 = 162.98 Still as you say something is amiss. You sure this account doesn't have a Commission fee?
Account where I am logged in is not commission free.
I printed commission after it enters 0.79 lot position - it shows 1 dollar.

As I remember trading with real money, commision for close was not taken.
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