General advice for stop placement:
1. Define a stop loss. Why do you set a stop loss?
-it's the point where you know that you're wrong.
2. Where/when will you know that you're wrong?
-Let your system/the market tell you.
Now, let's say you set your stop 10 pips away. What does that mean? Why would you set it there?
In my opinion, the way to go about this is find a spot in the market where you know that if price trades there, you will exit your trade. Set your stop there, and then decide if the trade is too risky for you.
And I'd try and shy away from the word scalping. It is typically trading the bid-ask spread and acting as a market-maker. If you tell yourself "I'm a scalper" rather than a trader, you'll behave as a scalper. If your system is to be a scalper, than sure, scalp away. But if you have a good trade and you cut your winner short because you say "Hey, profit! I'm a scalper", then you may not be happy with the long run scheme of things.