수익률 비율은 1:1, 2:1, 3:1 중 뭐가 현실적으로 좋을까? 🤔

That depends on the market/instrument, number of trades, win rate, type of trader, and size of trade. Also if you are scalping and taking tiny wins wirh tight risk, or swinging for longer intraday trades. The question is not answerable without any other information.

And slippage is mostly irrelevant in this scenario unless you are talking tiny trades.

It's tied to win rate, but let's talk equally weighted returns. In that case, the question becomes big, rare wins vs small, frequent wins. Both methods can be profitable, and its up to your individual style of trading works. One caveat is that a low win rate, high return style should be subject to stricter risk management as the chances of getting multiple losses in a row is higher.

Personally, I do better with max of 1:2, usually trading around 1:1, and even below. I use R:R as a filter for whether the trade is worth taking and whether I am asking too much of price. So typically a trade goes: set stop based on price structure -> set take profit based on price structure -> check R:R -> place the order, or monitor for better entry, or journal as a missed/untaken trade.

Again personally, my intraday trades tend to be high win rate low return unless a particularly nasty look above and fail or look below and fail develops, in those cases, risk is very clearly defined (loss or reclaim of key level), so I'll try a moonshot style 1:3++ trade, but it's always the worst feeling when my high win rate low return setup plays out counter to the moonshot direction.