Pip Calculation

Let's say I want to tell my friend how many pips I've made from a specific trade. What would I say if:

1. I bought 2 lots of EURUSD at 1.2500
2. I closed 1 lot at 1.2550 for +50 pips
3. I closed 1 lot at 1.2650 for +100 pips

If there is any standard for this, should I say 150 pips or 75 pips, the average?

Correction:
3. I closed 1 lot at 1.2650 for +150 pips

If there is any standard for this, should I say 200 pips or 100 pips, the average?

You can say that you've made two trades for +50 and +100. You can also say that you've made one for +150. Whichever you like best.

If you bought both at 1.2500 then you made 150 pips on the second lot, not 100

So I guess the average thing is not appropriate, right?

Think about this though, from your example, would you say you made 200 pips on a 150 pip move? This is kind of a slippery slope since most of the charlatans would rather have an inflated pip value. As for me, I prefer the average, what was my net gain. And if I didnt have to report it to someone, I wouldnt, Id rather just say to my friends or whoever, I made 4% on that trade.

I like to keep them guessing

Lol I like to keep them guessing too. I have put it wrong, it's actually for my journal and I don't know which one to note.

It's all about percentages. % increase on account. BUT, it really comes down to how much you risked to get that %age gain. I don't have any time for these people who say "I made a million pips this week !", tell me what your risk is in comparison, then I might be impressed. I remember a couple of years ago some guy on this forum boasted of a thousand pip draw down. One newbie thought the guy had big balls....I thought he was an idiot. Return on investment, thats what its about.
Trade safely

Got it, percentage it is!

I personally use the percentage. Pips are awesome to count and to use for a baseline, but Pips really don't tell you how much you've made, traded, or risked.

I used to worry about how many pips I made, now I worry about position sizing, money management, etc. If your money management is good, it will save you more times than you know.