The right entry won't make you profitable.
Edge, the durable advantage, is born only after you're already in.

Most people think trading success is about finding the right entry: a magic indicator, the right pattern, the exact moment to buy. Decades of systematic research say the opposite. The entry is the least important part, and that is not an opinion. It is the point where three independent sources, coming from three different directions, converge.

Van Tharp puts the system and the entry at roughly 10% of what actually determines the result. Andreas Clenow writes that "precise buy and sell rules are largely irrelevant". Turtle trader Curtis Faith says outright that "the entry is NOT the most important part". Three traders, three datasets, one answer.

Proportion according to one influential framework (Van Tharp). Illustrates the order of magnitude, not a precise measurement.

The edge is built downstream of the entry. Position sizing (how large a share of your money goes into each trade) decides how much you commit to each idea. Exits decide how long you let a winner run and how quickly you cut a loss. Diversification across uncorrelated (independently moving) markets reduces the swings without needing a better entry. And the discipline to take every signal, because profit concentrates into the few trades you cannot predict in advance.

Framework: the convergence of several independent books (Tharp, Faith, Clenow x2, Antonacci). The three durable layers work even when the entry is mediocre.

The first three layers are durable. They work even when the entry is mediocre. The precise entry rule is the fragile one, the most subject to wear, and it is exactly the part that gets sold the hardest.

If someone sells you a flashy entry signal ("buy here, 90% win rate"), they are selling the least important and fastest-perishing part. A serious system is judged by how it sizes its positions, exits, diversifies and survives drawdowns (larger declines), not by how pretty its entries are. This is also why our content is "boring". We do not make a fuss about entries, because that is not where the money is made.

We build in that order. The entry is the smallest decision we make, and the most attention goes to sizing, risk and diversification. This is not modesty, it is what the evidence says. We measure the result in years, not months.

Primer 04 looks at position sizing: how much to risk on a single trade, and why it is the most durable layer of them all. Out in August. It arrives by email on Substack and appears on this site at the same time.