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Coffee, food and a long London session

This is a less technical one but I think it gets overlooked. What you eat and drink before and during a session affects your decisions, and a scalping session is long enough for it to matter.

Caffeine is the obvious one. A cup before the London open is normal for most of us. The problem is the third and fourth cups mid morning. Caffeine raises alertness, but a lot of it also raises jitteriness and impatience, and an impatient scalper takes trades that aren't there. If you notice yourself clicking more in the second half of the morning, it's a reasonable thing to check.

Food matters too. Trading on an empty stomach makes some people sharp and others irritable. A heavy meal right before the New York open makes most people sluggish. Neither is great for quick decisions.

Water is easy to forget when you're watching charts. Mild dehydration affects concentration, and long screen sessions make it easy to go hours without drinking anything.

None of this needs a strict diet. Just pay attention to it for a couple of weeks. Note your caffeine and when you ate next to your trades in the journal. If the worst trades cluster at certain times, the cause might be partly physical.

It's a small edge, but it costs nothing and nobody can take it from you.

Sugar crashes are a real effect for many people. A sugary snack mid session gives a quick lift and then a drop an hour or so later. If that drop lands during your trading window, concentration falls right when you need it. Snacks that release energy more slowly, like nuts or something with protein, avoid that pattern for most people. It's a small change that can make the last part of a session feel noticeably steadier. Put the water bottle where you can see it and it tends to get used.

Breaks help more than most traders think. Getting up from the screen every hour, even for two minutes, stretching, walking to the kitchen, resets attention. Scalpers often avoid breaks out of fear of missing a setup, but a tired mind misreads setups anyway. If your setups are defined clearly enough, a two minute break rarely costs you anything. If you're worried, set an alert at the key level before stepping away so the platform watches it for you. Many traders find a light breakfast before the open and a proper meal after the session works better than eating at the desk.

The time zone you trade from changes this. Someone trading London from Asia is trading in the late afternoon or evening, with a full day behind them. Someone trading New York from Europe is trading after a full working day. Energy and attention are lower then for most people. If you trade sessions outside your natural daytime, the physical side matters even more, and it makes sense to be stricter about when to stop than someone trading the session in their own morning. Plenty of good setups repeat within the hour anyway, so a short break rarely costs a real opportunity.

Alcohol the night before is the one people tend not to mention. Even a moderate amount can affect sleep quality and reaction time the next morning, which matters for M1 decisions. If you notice that sessions after an evening out go worse, it's not your strategy. Some traders simply don't trade the morning after, and that's a cheap rule that protects the account. Track it honestly for a few weeks in your journal and see what the numbers say. A hard stop time that sits earlier in your own evening is a sensible rule for that situation.

Cutting back on the mid morning refills makes sense. For London traders there is also the timing of food. The session starts early for many people outside the UK, and skipping breakfast to be at the screen by 08:00 London often means the most important hour gets traded on an empty stomach. A small fixed meal before the open and a planned break around 10:30, when the first move has usually played out, gives a natural pause. It also keeps people away from the screen during the quieter late morning, which is no bad thing.

Ever looked up after what felt like a short burst of trading and found that an hour and a half had gone? Fast charts do something odd to time perception. Each new tick is a tiny piece of information that demands a reaction, and the brain stops tracking elapsed time because it is tracking events instead.

The reverse also happens. Sit through a flat stretch with nothing printing and five minutes drags like twenty. So the sense of how long a position has been open is unreliable in both directions, which matters for any scalp that has a time stop built into it.

Could be that this is why some people swear by a visible clock or a timer on the screen rather than trusting feel. A position that "feels like it has had enough time" is often well short of, or well past, the point where it was meant to be cut.

There is also the session-length problem. Fatigue creeps in unnoticed when the clock is not being felt, and the last hour of a long session often gets traded like the first.

Does anyone use a physical timer or an on-screen clock to keep session and trade duration honest, and has it actually changed when you stop?