The Share Price Changes the Arithmetic
Every rule set is supposed to be indifferent to price. Almost none of them are, and the same stop distance that is generous on a nine dollar share is invisible noise on a four hundred dollar one. That is where orb trading stocks bizstone sets the order deliberately, working from percentages before dollars, since trading the opening range across equities of wildly different prices means the plan has to survive a hundredfold change in the size of a single tick relative to the move.
Percent First, Dollars Second
The stable quantity across price levels is percentage movement. A share that typically travels one and a half percent between the market open and mid morning does that whether it trades at twelve dollars or two hundred. Converting the plan into percent terms, then back into dollars for the specific name, keeps stop distances comparable. Working directly in dollars produces a rule that is far too tight at one end of the range and far too loose at the other.
Tick Size and the Minimum Sensible Stop
Quotes move in cents. On a nine dollar share a ten cent stop is roughly one percent, which is a real distance. On a four hundred dollar share ten cents is a rounding error that will be taken out by the spread alone. Below a certain number of ticks a stop stops being a risk control and becomes a random exit, and that floor is different for every price level.
Spread as a Fraction of the Move
Absolute spread is not the number to compare. A two cent spread on a nine dollar name is twenty two basis points. A five cent spread on a four hundred dollar name is one. The expensive instrument is the cheap one, which is the opposite of what most screening does. Any filter that rejects names on a raw spread threshold is quietly selecting for high priced shares without meaning to.
Share Counts Get Awkward
Dollar risk divided by stop distance rarely produces a round number. On low priced shares the result is large enough that rounding is harmless. On expensive ones the answer might be eleven shares, and the difference between ten and twelve is a fifth of the intended position size. Small accounts trading high priced names hit this constantly, and the honest response is to trade a different name rather than to pretend the granularity does not matter.
Keep One Table
The practical fix is a short table with three price bands, each with its own minimum stop in ticks, maximum acceptable spread in basis points, and rounding rule for share size. It fits on one page. Checking a candidate against it before the opening bell takes seconds and removes the most common way a consistent method produces wildly inconsistent results across a watchlist.