SGX Rulebooks
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1. Introduction

1.1

Rule 4.10.1(c) requires Trading Members to have error prevention alerts to bring attention to possible erroneous entries of price, order size and other data fields.

Added on 3 June 20193 June 2019.

1.2

This Practice Note explains the types of error-prevention alerts contemplated in Rule 4.10.1(c).

Added on 3 June 20193 June 2019.

2. Error-prevention alerts

2.1

The purpose of requiring Trading Members to have error prevention alerts is to give Trading Members the opportunity to review the order and confirm its accuracy before it is transmitted to the Trading System for matching.

Added on 3 June 20193 June 2019.

2.2

The types of error-prevention alerts to be made available may include but are not limited to the following:

(a) maximum quantity per order — to alert Trading Representatives and customers of possible erroneous entries in relation to quantity; and
(b) price alerts — to alert Trading Representatives and customers of possible erroneous entries in relation to price.

Added on 3 June 20193 June 2019.

2.3

Price alerts. Price alerts should trigger when the order price is far away from the prevailing market price in that it deviates by:

(a) a certain percentage; or
(b) a certain number of ticks,

as compared to the prevailing market price. The prevailing market price may be the last traded price, the previous settlement price, the closing price or the opening price, as appropriate.

Added on 3 June 20193 June 2019.

2.4

Order size alerts. Order size alerts should trigger when the order size exceeds a pre-set threshold. The threshold may be set in terms of quantity or value of an order.

Added on 3 June 20193 June 2019.

2.5

Other data field alerts. Other data field alerts may include order type alerts that would trigger when an order is of a type that differs from other orders existing in the market (e.g. a buy order instead of a sell order).

Added on 3 June 20193 June 2019.