I guess, in this case, I'm "anyone else".
I highlighted that sentence in your quote (above), because that's what I want to talk about.
There is no such thing as an entry on the m5 chart, or an entry on the H4 chart.
There are two price series: a BID price series and an ASK price series.
You can go LONG (loose terminology: buy) at any time, at the prevailing ASK price.
Or you can go SHORT (loose terminology: sell) at any time, at the prevailing BID price.
When you take either one of these positions, you are not entering on a particular chart -- you are entering at a particular price-point, at a particular time.
Prices can be displayed any number of ways. The 5-minute chart and the 4-hour chart mentioned above are just two of the ways that prices -- including your entry price, your TP, and your SL -- can be displayed.
If you follow the 3 Ducks methodology, and decide -- after analyzing the 4-hour, the 1-hour, and the 5-minute charts -- to take a position, you are not entering on the 5-minute chart, or on any other artificially subdivided time-frame. You are entering a real market, in real time, at the prevailing price in that market at that time.
Your choice of a profit-target price, and your choice of a stop-loss price, may be based on price-action over the recent few minutes, or over the recent few hours, or over the recent few days. Those choices might even be based on price-action over the past several months or years. However you make these choices, they depend on your perception of dominant trends and of important support and resistance levels. But, no matter how far back in time you look in order to establish your TP and SL levels, the TP and SL orders you place are placed in the here-and-now -- in the real market, in real time.
If you and I each take a LONG position in a particular pair, at exactly the same time, it doesn't matter that you entered after analyzing the m5 chart, and I entered after analyzing some other time-frame. You and I will have identical LONG positions, entered at the same identical price.
You might place your stop-loss at a level very different from where I place my stop-loss. But, your stop-loss, and my stop-loss, reside in the same real-time market.
If you have chosen a SL level based on your analysis of the 4-hour chart, while I chose mine on the basis of the 1-hour chart, then maybe I'll get stopped-out for a loss, while your trade will survive minor drawdowns and go on to close in profit.
But, all of this action occurs in the only time-frame that matters: real-time.
The market doesn't have time-frames. The market simply is. The market has price, and the market has now. Everything else is price history.
Time-frames are artificial constructs invented by traders to facilitate looking at price history in different slices, or tranches. Time-frames clump all the price-action occurring in a particular segment of time into one neat package, represented by a bar or a candle. That price segment -- 1-minute, 1-hour, 1-day, etc. -- is then displayed as four "key" prices -- open, high, low, and close -- ignoring all the other price-action which occurred in that segment.
In other words, a "time-frame", as we commonly think of time-frames, is a partial look at price history. It's a look at price history which reduces the complexity of that history to those "key" prices I mentioned above.
Consider these two charts, and tell me how they differ:
These charts show exactly the same price-action -- the AUD/USD from March 26 until today. The upper chart is a 5-minute chart, and the lower one is a 4-hour chart. The only difference is the detail, contained in the 5-minute chart, which is missing from the 4-hour chart.
When we look to a higher time-frame chart to gain insight into the price action of a particular pair, we are really just looking farther back in time. Typically, a 4-hour chart will display price action over the past couple of months, while a 5-minute chart will display price action over the past couple of days -- unless the 4-hour chart is stretched horizontally, and the 5-minute chart is squeezed horizontally to make them cover the same period of time. Which is what I did to the charts above, in order to make a point.
The point of this exercise is that when we look to higher time-frame charts to establish logical TP and SL levels, we are simply looking farther back in time, to find highs and lows, or other indications of probable future resistance and support.
No matter how far back in time we look, when it comes to placing a TP or a SL, the only time-frame that actually exists is "the present".