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nautilus_data/option_chains/
constants.rs

1// -------------------------------------------------------------------------------------------------
2//  Copyright (C) 2015-2026 Nautech Systems Pty Ltd. All rights reserved.
3//  https://nautechsystems.io
4//
5//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
6//  You may not use this file except in compliance with the License.
7//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
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10//  distributed under the License is distributed on an "AS IS" BASIS,
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13//  limitations under the License.
14// -------------------------------------------------------------------------------------------------
15
16//! Module-level constants for option chain rebalancing behavior.
17
18/// Hysteresis band for ATM rebalancing (0.0..=1.0).
19/// Price must cross this fraction of the gap to the next strike before ATM shifts.
20/// E.g., 0.6 means price must move 60% past the midpoint between two strikes.
21pub const DEFAULT_REBALANCE_HYSTERESIS: f64 = 0.6;
22
23/// Minimum time between rebalances in nanoseconds (5 seconds).
24pub const DEFAULT_REBALANCE_COOLDOWN_NS: u64 = 5_000_000_000;