It comes down to leverage and overall exposure:
If you are position trading, holding a trade for 3 months or longer, you can greatly simplify your trading. Get a firm grasp of fundamentals, determine which currency(s) has the advantageous, long term relative movement you seek and enter. That’s it.
You don’t have to worry about precise entries (you don’t have to worry about entries at all – just enter) and, if trading without leverage, you don’t even have to worry too much about stop placement – just enter a stop somewhere far enough away from the action to cover a black swan type event. The only way you will lose all of your money is if the currency you are trading disappears.
As far as adding to the positions, absolutely! If price continues to move in your direction and fundamentals favor a continued movement in that direction then you have the opportunity to build larger and larger positions over time.
Not everything, however, is easy when it comes to position trading. First, you have to have a firm grasp of fundamentals. Technical analysis trading can be confusing. Fundamental trading is an absolute morass of “interconnectedness” among all currencies, markets and events.
Leverage kills in position trading. Kills. Murders. Destroys. Using anything but the lowest leverage (if you use it at all) is an act of account homocide.
Using little to no leverage in forex is rather silly unless you have giant stacks of money you want to park somewhere until you can find something more profitable to do with it. The relative fluctuations in price among currencies is actually quite small. That is why such high leverage is available in this market to begin with. It allows one to amplify those very small movements into something worthwhile.
There is nothing wrong with position trading. It can be moderately profitable. It is not discussed much on forums because it is BORING. You enter a trade and that is it. See you next quarter. Forex is also not the most profitable market for trading when the position is “invested” for extended periods of time on zero to low leverage. There are better markets for that.
If you are interested in pure swing trading – then you are just trading primarily off the daily charts and holding for several days to weeks. You are also, no doubt, using much higher leverage than you would be if you were position trading. The relative movement of a currency over a few days is miniscule in real terms. The amplification of those movements through leverage is what makes trading forex appealing so the shorter the timeframe, the larger the leverage needed to see any actual, meaningful profits.
Adding to positions in a trade of such short duration, using leverage, simply adds to increasing the risk of an otherwise profitable position. The analysis you performed told you there was a good trading opportunity, you did a proper risk management assessment and entered the trade. If it continues to move in your favor, enjoy the rewards. Why put those gains in jeopardy? When you eventually close the position then you can put those gains to use in your next trade to increase your future position sizes.
You can keep adding to those positions as they become profitable and as you continue moving your stops forward to lock in additional gains but you’re taking additional trades on an ever-depleting capital basis. You can keep adding to positions long as you have money to add but those gains are never realized and put to use compounding until you actually close the positions out. Basically, your total exposure continues to increase.