If I understand the trade you took, the answer to your question is: [B]4000[/B] — meaning 4,000 units of base currency (but leaving out the [I]comma[/I]).
Here is my understanding of your trade:
• USD account currency
• $160 account balance
• EUR/USD pair traded
• 4000-unit position size
• 1.2719 EUR/USD price at time of entry
If those figures are correct, then the pip-value calculator, with data entered, would look like this:
The answer displayed by the Calculator (0.4) means $0.40 per pip [B]for this size position.[/B]
You could have figured this in your head.
The cross-currency (USD) in this trade is the same as your account currency (USD). Whenever this is the case, then the value of one pip is always:
• $10 per pip, per standard lot (100,000 units of base currency)
• $1 per pip, per mini-lot (10,000 units)
• $0.10 per pip, per micro-lot (1,000 units)
• $0.01 per pip, per nano-lot (100 units)
• $0.0001 per pip, per unit of base currency
Your position size (4,000 units) could have been figured (in your head) in any one of these ways: 0.4 mini-lot, 4 micro-lots, 40 nano-lots, or 4,000 units.
But, if you’re using the Pip-Value Calculator, there is only one way to enter position size, and that is [B]by units.[/B] So, a very large position, say 100 standard lots, would be entered as 10000000 units.
The rule given above, regarding the cross-currency and the account currency being the same currency, applies to any account currency (except euro, which is a special case).
If your account currency were AUD, for example, then any pair of the form XXX/AUD would follow the rule. That is, one pip would be worth A$10 per standard lot, A$1 per mini-lot, etc.
If your account currency were JPY, then EVERY yen-pair would follow the rule, because in every yen-pair the JPY is ALWAYS the cross-currency. But, a multiplier (100) is applied to yen calculations, because the yen has relatively tiny value compared to the other major world currencies. So, for example, if you were to trade USD/JPY — [B]or any other yen-pair[/B] —in a yen-account, then one pip would be worth ¥1,000 per standard lot, ¥100 per mini-lot, etc.
The rule given above does not apply to euro-denominated accounts, because the EUR is NEVER the cross-currency in any currency pair. By international agreement, in all currency pair quoting, the EUR is ALWAYS the base currency. That is, all euro pairs have the form EUR/XXX. The same international agreement places the JPY at the bottom of the currency hierarchy, making it always the cross-currency in any pairing.
Sorry, I sort of ran down a rabbit-trail, there.
I hope that I have answered your question.