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To: gbh who wrote (9530)8/19/1998 2:59:00 PM
From: Morpher  Read Replies (2) | Respond to of 16892
 
ISLD is only useful for non-marketable limit orders. Firms like CyberTrader, MB Trading, etc. give you the options of using SOES for quick marketable orders fills, SelectNet preferencing and broadcasting for both marketbale and non-marketable orders, other ECNs (like INCA which handles twice the ISLD's volume and is often active after the bell, or ARCA which automates some order routing).