Add Rolling & Expansion Feature To Grid Bots#538

3Commas does this – enables the bots to roll up or down or expansion up or down.

Trailing Up (long):
Cancels the lowest buy, re‑posts it one step above the prior High as price rises, sliding the entire grid upward.

Expansion Up (shorting, uses capital):
Leaves existing grid untouched and drops an extra sell order one step higher every time the highest sell fills.

Trailing Down (shorting):
Cancels the highest sell, re‑posts it one step below the prior Low as price falls, sliding the grid downward.

Expansion Down (long, uses capital):
Leaves existing grid, drops an extra buy order one step lower whenever the lowest buy fills.

On 3Commas Trailing Up isn’t available for Short/Reversal bots, and Trailing Down isn’t offered for Long bots. In those cases expansion is literally the only way to follow price beyond the original band which uses more capital, but keeps you in the game longer until the price moves in your favor again.