entry_execution.type decides how the entry order is placed.

Market (default)

"entry_execution": {
  "type": "market",
  "apply_slippage": true
}

Fills at the current close (or live price on tick mode). Guaranteed to fill; price not guaranteed.

Limit

"entry_execution": {
  "type": "limit",
  "offset_pct": 0.1,
  "apply_slippage": false
}

Places a limit order offset from the current close. For longs, the offset is below the close; for shorts, above. The entry fills only if the bar's range reaches the limit price - otherwise no trade.

When to pick which

Market - when the signal is time-sensitive (breakout, fakeout reversal) and you can't afford to miss the entry.
Limit - when you have a reference level you want to pay (a pullback price, a zone touch) and you'd rather skip the trade than chase.

Why scaled execution is gone

Older strategies referenced a scaled type that simulated weighted fills across multiple price points. It was retired because it could produce entry prices outside the bar's actual OHLC range - impossible in real trading. type: "scaled" now behaves like market.