Anyone putting a label on a trading style that is defined by the length of time a position is held is bonkers. Anyone setting a time limit on a trade is doubly bonkers. Day trading exists for those trading on margin as closing the trade within the day will avoid holding costs, however, as said above, anyone setting a time limit on trades is bonkers. Highly successful traders such as those at MEDALLION, say they will hold a trade until the objective is reached whether that's a moment or a season.
If you are trading based on bars can be used in a day session and you have no position after market closes==day trading. For example, any bars smaller than a 30 m bar in the US session. You cannot use a montly bar for day trading, and 5 m bar for a multiday swing is useless.
What about using short term options on the ES? https://www.cannontrading.com/tools/trading-weekly-mini-sp500-options-contracts You can buy Mon- Wed -Friday options close to the money and if you are right on the direction the delta is pretty high, if you are wrong you have the pre defined risk of the premium you pay. This tool MAY give you better staying power.
You should be as it's worth studying their methods and strategy, it is the most successful fund in history. So successful that very early in its existence it closed itself to outside investors, its only investors now are the traders themselves and just a handful of the early investors, they are all worth $bbb.
Here's a posibility - "The term ‘swing trading’ refers to trading both sides on the movements of any financial market. Swing traders aim to ‘buy’ a security when they suspect that the market will rise. Otherwise, they can ‘sell’ an asset when they suspect that the price will fall."