Day trading signals: what an intraday call is and is not

FundSpec, 8 September 2026

An intraday signal is a specific thing: a model, watching a stock's minute bars, has decided that the odds over the next short stretch of time favour one direction, and has said so. It is not a prediction of where the stock closes, not a view on the company, and not an instruction. This guide is about reading such a signal correctly, and about the parts of day trading that no signal can do for you.

What the signal contains

A FundSpec day trading model publishes a direction, long or short, on a ticker at a time, and later publishes the close of that position. Between the two, the position is open and the model is either right or wrong. The record of every closed position is what the model's track record is built from.

The signal has a horizon baked in. A model trained on five minute bars with a short reward horizon is making a call about the next hour, not the next day. Acting on it an hour late is acting on a different call than the one that was made, which is why FundSpec Unlimited shows calls as they are published rather than after the fact.

Timing is most of the edge

Intraday moves are small. A stock that moves two percent in a day moves a fraction of a percent in the window most day trading calls cover. The edge in a good intraday model is real but thin, and it is easily consumed by delay. A call seen a few minutes after it was made has already lost part of its value; a call acted on after the model has closed the position has none.

This has a practical consequence. Day trading from signals is only possible with realtime data and the attention to act on it. If either is missing, the swing trading models built on daily bars are the honest choice, because their calls remain valid for days rather than minutes.

Liquidity and cost decide whether the edge survives

Every trade pays the spread between the bid and the ask, and every intraday trade pays it twice within hours. In a large, liquid stock the spread is a cent or two and the cost is small against a move of a few tenths of a percent. In a thinly traded name the spread can be wider than the move the model is trying to capture, and no signal, however accurate, can pay for that.

Before following an intraday model on a ticker, look at the ticker's typical dollar volume, which FundSpec shows on the compare view and stock page. A model's record already reflects the prices at which its calls were made, but it does not know the size you intend to trade or the commission you pay.

Reading a day trading record

A day trading model makes many trades, so its record accumulates quickly and its statistics are more meaningful than a swing model's after the same number of weeks. Read the profit factor before the win rate: a model that wins fifty five percent of the time with wins larger than its losses is a good model, and one that wins seventy percent with losses twice the size of its wins is not. Read the average winning move against the spread of the stock. And read the number of trades, because a record that looks strong over a week has been tested through one kind of market.

The discipline the signal cannot supply

A signal gives a direction. It does not give a position size, a stop or an exit if the trade goes wrong before the model closes it. Those are yours to decide before you enter, and the traders who last are the ones who decide them in advance and do not revise them while the position is open.

The model also has no view about the day. It does not know that the Federal Reserve announces at two o'clock or that the company reports after the close. A calendar of the day's events, the earnings calendar and the options flow on the ticker are the context around the signal, and a signal read with that context is worth more than one read alone.

What an intraday call is not

It is not a forecast of the close. It is not a statement about the company's value; the fair value model is a different tool for a different horizon. It is not advice, and it is not a trade FundSpec makes on your behalf, because FundSpec makes no trades at all. It is one model's reading of one stock's recent bars, with a public record of how such readings have gone. Used with the timing, the liquidity check and the discipline above, that is a useful thing to have. Used without them, it is a coin with a memory.

How FundSpec shows it

The Day Trading Models screen lists the released intraday models with their calls for the session and each model's record. Recent winning trades are visible to everyone; FundSpec Unlimited shows every call as it is published. Each model's overview shows its closed trades, win rate, average winning move, profit factor and most recent win.