Decrease and Fade

decrease

A change downward.
- usage: "there was a decrease in his temperature as the fever subsided"; "there was a sharp drop-off in sales"
- synonyms: lessening, drop-off
A process of becoming smaller or shorter.
- synonyms: decrement
The amount by which something decreases.
- synonyms: decrement
The act of decreasing or reducing something.
- synonyms: diminution, reduction, step-down

Decrease in size, extent, or range.
- usage: "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
- synonyms: diminish, lessen, fall
Make smaller.
- usage: "He decreased his staff"
- synonyms: lessen, minify

(v.t.) To cause to grow less; to diminish gradually; as, extravagance decreases one's means.
(v.) A becoming less; gradual diminution; decay; as, a decrease of revenue or of strength.
(n.) To grow less, -- opposed to increase; to be diminished gradually, in size, degree, number, duration, etc. or in strength, quality or excellence; as, they days decrease in length from June to December.
(v.) The wane of the moon.

Webster's Revised Unabridged Dictionary

fade

A golf shot that curves to the right for a right-handed golfer.
- usage: "he took lessons to cure his slicing"
- synonyms: slice, slicing
Gradually ceasing to be visible.
- synonyms: disappearance

Become less clearly visible or distinguishable; disappear gradually or seemingly.
- usage: "The scene begins to fade"; "The tree trunks are melting into the forest at dusk"
- synonyms: melt
Lose freshness, vigor, or vitality.
- usage: "Her bloom was fading"
- synonyms: wither
Disappear gradually.
- usage: "The pain eventually passed off"
- synonyms: evanesce, blow over, pass off, fleet, pass
Become feeble.
- usage: "The prisoner has be languishing for years in the dungeon"
- synonyms: languish

(a.) To sink away; to disappear gradually; to grow dim; to vanish.
(a.) To become fade; to grow weak; to lose strength; to decay; to perish gradually; to wither, as a plant.
(a.) Weak; insipid; tasteless; commonplace.
(v.t.) To cause to wither; to deprive of freshness or vigor; to wear away.
(a.) To lose freshness, color or brightness; to become faint in hue or tint; hence, to be wanting in color.

Webster's Revised Unabridged Dictionary

Selling a rising price or buying a falling price. A trader fading an up opening would be short, for example.