Who's selling to you when you jump on a moving train

The market won't ring a bell when it's time to get in. You ring it yourself — usually at the moment the move is so obvious it's on the evening news. But "obvious" and "profitable" pull against each other. When a chart goes vertical and your head is pounding jump in while it's running, it's worth stopping for a second and asking the question Fat Tony from our piece on black swans would ask: not "how far will it go?" but "who's selling this to me right now, and why?"

By the time it's obvious, it's late

Chasing the market has one property you can count on: it arrives late. While a move is quiet and boring, nobody talks about it. The moment it's "obvious", the part where the edge was largest has already happened. Whoever gets swept up abandons their plan and starts trading on impulse — and impulse usually pays worse than composure. The harder you chase a move that's already running, the worse the price you pay to get in. A stock parabolic the day after earnings, an index that's "running away": in both cases you're buying enthusiasm, not opportunity.

Who's on the other side of the trade

Every trade has two sides. When you buy in the euphoria, someone is selling — and it's worth knowing who. A large player can't dump size into the market at once, it would push the price against them. So they accumulate quietly, in small pieces, during the calm phases nobody cares about. And they distribute into strength — into the hype, when demand is highest and the crowd is shouting jump in. When a move is "obvious", it may well be in the phase where someone patient is handing over what they spent months collecting, to you. That is the uncomfortable truth about chasing: far too often, you are the one supplying the liquidity for someone else's exit.

And it doesn't happen by accident. Whoever needs to buy large size doesn't throw it in with one order — they slice it into hundreds of small pieces and release them over time so as not to move the price. Algorithms like TWAP or VWAP do it automatically: buying slowly, quietly, in volume that disappears into the normal flow; an iceberg order shows only the tip of the total quantity and hides the rest. That's why the phase looks boring on the chart — the price in no hurry — precisely because someone is patiently collecting it. And that boredom is exactly when the edge is largest. When the price finally "breaks out" and the crowd runs in, it's often the same side quietly feeding the volume back into the market.

A system has no FOMO

Systematic trading doesn't have this weakness, for a simple reason: a system doesn't see headlines, it sees rules. It doesn't enter because "it's running", but because the logic you tested across every kind of weather said so. And crucially, it has no emotion pushing it to jump. Trading psychology is said to be more than half of success — and its most expensive mistake is exactly this chase; a system structurally can't make it. On top of that, chasing carries a hard execution cost: you jump into a running move, so you get a worse fill, a wider spread, slippage. And the data is merciless: impulsive entries underperform planned ones on practically every metric.

The difference isn't that the system is smarter. It's that it has its entry defined in advance and holds to it. A good rule usually doesn't want to buy strength at any price — it waits for a condition: a pullback to a level, a confirmation, a specific price. When the market runs away without that condition, the system simply doesn't enter and lets it go. That sounds like a missed opportunity until you count how many "missed opportunities" never took you down. And even when a rule does enter a running move, position size keeps the loss from one bad entry to something you can bear. Composure can't be switched on by deciding "now I'll be disciplined"; it can only be taken out of your hands and handed to a rule. A practical test of whether you're trading or chasing: write down your entry price before anything happens. If you then buy well past it because "it's still going", you're not buying your plan — you're buying the move.

The average lies

So why does chasing occasionally "work"? Because a few extreme moves hold up the whole illusion. You remember the one time you jumped in late and it kept flying, and forget the ten times it took you out right after entry. The average lies — a few lucky days paper over a steady loss, exactly like with fat tails. Discipline wins not because it's exciting, but because it doesn't depend on whether today happens to be the one bad entry that takes you out.

And it's not just about the average, it's about the shape. Jumping late into a running move is a bet with an ugly asymmetry: there's little left on the upside, because most of it has already happened, while the downside is open, because the reversal from a top tends to be fast. A string of late entries that ran a little longer hands you a few small gains — and one reversal, arriving exactly when your confidence let you size up bigger, takes them all at once. A strategy that wins almost always and one day wipes you out isn't a profitable strategy — it's a deferred bill.

Where this matters most

One honest note, so it doesn't read as a universal law. All of this is mainly about your investment horizon and about what you trade. If you buy a broad index regularly over the long run, you barely deal with timing — you buy in gradually, whether it's a party or a hangover, and time works for you. But the moment it's about picking individual stocks, about commodities or forex, where timing is half the craft, every word of this article carries full weight. The shorter the horizon and the more you stand on timing, the more a late entry costs you.

Which game are you playing

In the end it's a choice about which game you want to play. Either you chase moves everyone can already see and hope you're not the last one at the table. Or you have a rule that enters when it makes sense, not when the crowd is shouting — and calmly lets a move run because it knows the next one is coming. That's exactly what BXF is built around: the entry is a rule, not a feeling; you test it across every kind of weather and measure whether rushed entries are eating your edge. Because the best trade is often the one you don't make — the one the system didn't bless. The market is like a party. Turning up right at the start, in a half-empty room where nobody knows if it will be worth it, takes stomach — that is entering right after a bear market. The best is when it gets going. But after 3 a.m. nothing good happens anymore, and whoever shows up when everyone is drunk and the tables are full of empty bottles isn't a guest — they're the cleanup crew. Jumping on a moving train means arriving at the party at 3 a.m. And the hardest discipline of all? Leaving while it's still good.

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