What actually happens as a one minute candle closes
Posted: Mon Nov 02, 2026 12:38 pm
What actually happens as a one minute candle closes
Candle closes are not special to the market, but they matter to traders and to algorithms that act on them. A setup that triggers on the close of a one minute candle creates a small burst of orders at second 59 or second 00.
Many retail strategies wait for the candle to close before entering, which means the entry orders arrive at almost the same moment from many sources. That creates a short rush of activity right after the close, a few hundred milliseconds of competition for fills.
Scalpers who rely on candle closes often find that entry prices are slightly worse than the close price on the chart. The distance varies with market conditions but can be consistent enough to measure.
A useful experiment is comparing entry prices at the close with prices a second or two later. If the later price is consistently better, the strategy may do better with a short delay or a limit order.
Chart candles are artifacts of time slicing. The market itself has no concept of a minute, but the participants do, and their behaviour leaves a trace.
A neat way to measure the effect: log the signal price at the close of the bar, the actual entry price, and the delay in milliseconds. The average of the difference is the true cost of the signal convention and sometimes exceeds the spread.
It also hints at a design change. Strategies that wait for a close and then fire market orders are competing with many others doing the same. Alternatives include entering on a break of the prior bar's extreme using a stop order, or placing limit orders in advance at the levels the signal tends to produce.
None of these is automatically better. The point is knowing how much the convention costs, and deciding on purpose whether it is worth paying.
How far from the closing price are the entries typically filled?
Candle closes are not special to the market, but they matter to traders and to algorithms that act on them. A setup that triggers on the close of a one minute candle creates a small burst of orders at second 59 or second 00.
Many retail strategies wait for the candle to close before entering, which means the entry orders arrive at almost the same moment from many sources. That creates a short rush of activity right after the close, a few hundred milliseconds of competition for fills.
Scalpers who rely on candle closes often find that entry prices are slightly worse than the close price on the chart. The distance varies with market conditions but can be consistent enough to measure.
A useful experiment is comparing entry prices at the close with prices a second or two later. If the later price is consistently better, the strategy may do better with a short delay or a limit order.
Chart candles are artifacts of time slicing. The market itself has no concept of a minute, but the participants do, and their behaviour leaves a trace.
A neat way to measure the effect: log the signal price at the close of the bar, the actual entry price, and the delay in milliseconds. The average of the difference is the true cost of the signal convention and sometimes exceeds the spread.
It also hints at a design change. Strategies that wait for a close and then fire market orders are competing with many others doing the same. Alternatives include entering on a break of the prior bar's extreme using a stop order, or placing limit orders in advance at the levels the signal tends to produce.
None of these is automatically better. The point is knowing how much the convention costs, and deciding on purpose whether it is worth paying.
How far from the closing price are the entries typically filled?