When the Trigger Price Is Not a Tradable Increment

Two levels that look identical in a spreadsheet can be several ticks apart on the ladder. A computed midpoint of 4512.3750 and the nearest tradable price of 4512.25 are the same number to a chart and different orders on an exchange, and the note orb trading signals mlstpodcast publishes on this covers what happens in between. Trading rules that generate a price by arithmetic, whether from an opening range midpoint, an average true range multiple or a percentage of the range width, will produce values the instrument cannot quote, and the rounding that follows is a decision somebody has to make deliberately.

Where the Untradable Numbers Come From

Any division does it. Half the range, a third of the range, sixty percent of the average daily movement, all land between increments most of the time. So does anything built on an indicator that outputs a smoothed value. The high and low of the opening range are always tradable because they were traded; everything derived from them usually is not.

Round in the Direction That Costs You

The safe convention is to round every trigger away from the entry and every stop away from the position. A long trigger rounds up, a short trigger rounds down, a long stop rounds down. That makes each rounding slightly more conservative rather than slightly more optimistic, and over a few hundred intraday trades the difference between the two conventions is not small.

State the Increment for Every Instrument

The tick is a property of the contract and it changes between them and sometimes within them. Index futures, energy contracts, individual equities under a dollar and currency pairs all quote differently, and some products use one increment inside a band and another outside it. Write the increment next to the symbol on the watchlist so the rounding is mechanical during regular trading hours rather than remembered.

What a Rejected Order Looks Like

Some venues reject a mispriced order outright, which is the good case because it is loud. Others silently round it themselves, and the platform's rounding is not necessarily the direction you would have chosen. Worse, a resting order placed at an impossible price during premarket can sit unrejected until the open and then behave unexpectedly at the cash open, which is the single worst moment to discover it.

Check It Once, in the Right Place

The check belongs in whatever produces the number, not in the head of whoever reads it. A spreadsheet column that rounds to the increment, or a line in the alert that shows the adjusted price, makes the untradable value impossible to act on. Doing it by eye works until the morning the 15 minute range is unusual and the arithmetic lands somewhere nobody expected.