Sorry I'm late with the reply. For what ever reason I missed the question. I treat all stocks I trade the same. The capital I have doesn't affect my position size. I can see where you are coming from, risking 1% of a 10K account is a lot less cash than risking 1% of a 100k account. When you get to 100K it won't seem like such a big number. It's 1% of your capital.
Mathematically it doesn't seem like it makes a difference unless you really time the top badly, like decades. I would say treat each buy/sale as its own thing. You sold too low? Who cares.
I'm thinking it does make a difference but I'm not sure how. I treat each trade according to plan, I'm toying with changing the plan to scaling out. Take out a third at a target, a third at a trendline break and a third at a trailing stop. As for who cares if I sold to low; I do! That good old Greed emotion, I hate to leave money on the table. It's always those trades that you let get away that live rent free in your mind.
Consider looking at support and resistance levels to make buy or sell decisions. When the trend line is moving downwards, it’s a downtrend and when it is going up, it’s uptrend. It’s not possible to precisely predict the turning point. Look at the recent past trades if you think the trend has moved enough in one direction. It's better to take action instead of waiting so that you can earn a few more pips.