{"id":7245,"date":"2025-12-09T16:20:00","date_gmt":"2025-12-09T22:20:00","guid":{"rendered":"https:\/\/librarytestdev.wpenginepowered.com\/?post_type=doc&#038;p=7245"},"modified":"2026-01-23T11:15:14","modified_gmt":"2026-01-23T17:15:14","slug":"excessive-bid-ask","status":"publish","type":"doc","link":"https:\/\/library-staging.tradingtechnologies.com\/tt-trade-surveillance\/core-models\/trading-behaviors-models\/excessive-bid-ask\/","title":{"rendered":"Excessive Bid\/Ask"},"content":{"rendered":"\n<p>The Excessive Bid\/Ask model looks for when a single trader&#8217;s submitted orders make up the majority of the bid\/ask volume of an instrument at different times during a trading session. The Excessive Bid\/Ask model in TT Trade Surveillance uses the frequency and severity of Order Book Dominance (OBD) clusters generated for a trader\/instrument combination to help determine if a trader is potentially exerting control over an instrument&#8217;s price by submitting a large number of bids and asks during the session.<\/p>\n\n\n<p>When a single trader&#8217;s orders make up a large amount of the bid\/ask volume for an instrument, this may indicate control over the pricing of that instrument. The Excessive Bid\/Ask model can alert your firm to this behavior, which may be an indication of potential market manipulation.<\/p>\n\n\n<p><strong>Note<\/strong>: The Excessive Bid\/Ask model only identifies potentially suspicious trading behavior. This model does not necessarily reflect an actual rule violation.<\/p>\n\n<h2>Scoring methodology<\/h2>\n\n\n\n\n<p>Higher scores indicate the trading activity within a cluster is more likely to risk regulatory concern. A company&#8217;s\n    risk monitors can use these scores to prioritize resources for investing which users&#8217; trading activity poses the\n    most regulatory risk.<\/p>\n\n\n\n<h2>Excessive Bid\/Ask score interpretation<\/h2>\n\n<p>The Excessive Bid\/Ask model finds instances where the trader submits a high number of bids\/asks relative to the session volume.<\/p>\n\n<p>Each cluster is assigned a risk score on a sliding scale between 0-100. This score represents the probability that Excessive Bid\/Ask occurred during the duration of the cluster&#8217;s trading activity.<\/p>\n\n<p>Based on TT Trade Surveillance best practices, clusters that score over 75 are deemed to be \u201chigh risk\u201d and should be the primary focus of users during their compliance reviews.<\/p>\n\n\n\n\n<h2>Excessive Bid\/Ask scorecard metrics<\/h2>\n\n\n<p>The Scorecard Metrics section measures the following statistics related to identifying the excessive bid\/ask submissions:<\/p>\n\n\n<ul>\n    <li><b>Session Vol<\/b> \u2014 Total volume for the trading session.<\/li>\n    <li><b>Session Open<\/b> \u2014 The instrument&#8217;s opening price for the session.<\/li>\n    <li><b>Session Close<\/b> \u2014 The instrument&#8217;s closing price for the session.\/li&gt;\n    <\/li><li><b>Trader Vol<\/b> \u2014 The trader&#8217;s total volume.<\/li>\n    <li><b>OBD Clusters<\/b> \u2014 The number of identified order book dominance (OBD) clusters.<\/li>\n    <li><b>Avg OBD Score<\/b> \u2014 The average order book dominance (OBD) score.<\/li>\n    <li><b>Avg OBD Buy Mkt Dom<\/b> \u2014 The average order book dominance (OBD) score for the &#8216;buy&#8217; side of the market.<\/li>\n    <li><b>Avg OBD Sell Mkt Dom<\/b> \u2014 The average order book dominance (OBD) score for the &#8216;sell&#8217;  side of the  market.<\/li>\n    <li><b>Avg OBD Top5 Buy Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as order book dominant for the &#8216;buy&#8217; side of the market.<\/li>\n    <li><b>Avg OBD Top5 Sell Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as order book dominant for the &#8216;sell&#8217; side of the market.<\/li>\n\n\n    <li><b>HighRsk OBD Clusters<\/b> \u2014 The number of high-risk order book dominance clusters.<\/li>\n    <li><b>Avg HighRsk Score<\/b> \u2014 The average high-risk score.<\/li>\n    <li><b>Avg HighRsk OBD Buy Mkt Dom<\/b> \u2014 The average high-risk order book dominance (OBD) score for the &#8216;buy&#8217; side of the market.<\/li>\n    <li><b>Avg HighRsk OBD Sell Mkt Dom<\/b> \u2014 The average high-risk order book dominance (OBD) score for the &#8216;sell&#8217; side of the market.<\/li>\n\n    <li><b>Avg HighRsk OBD Top5 Buy Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as high-risk order book dominant for the &#8216;buy&#8217; side of the market.<\/li>\n\n    <li><b>Avg HighRsk OBD Top5 Sell Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as high-risk order book dominant for the &#8216;sell&#8217; side of the market.<\/li>\n    <li><b>Ratio HighRsk Vs Total Clstrs<\/b> \u2014 The ratio of clusters identified as high-risk to the total number of clusters.<\/li>\n    <li><b>Ticks Moved Open to Close<\/b> \u2014 The total number of ticks which the instrument&#8217;s price moved between the opening and closing prices.<\/li>\n    <li><b>Price Pct Move Open to Close<\/b> \u2014 The total percentage of change between the opening and closing prices.<\/li>\n\n\n    <li><b>MedRsk OBD Clusters<\/b> \u2014The number of medium-risk order book dominance clusters.<\/li>\n    <li><b>Avg MedRsk Score<\/b> \u2014 The average medium-risk score.<\/li>\n    <li><b>Avg MedRsk OBD Buy Mkt Dom<\/b> \u2014 The average medium-risk order book dominance (OBD) score for the &#8216;buy&#8217; side of the market.<\/li>\n    <li><b>Avg MedRsk OBD Sell Mkt Dom<\/b> \u2014 The average medium-risk order book dominance (OBD) score for the &#8216;sell&#8217; side of the market.<\/li>\n    <li><b>Avg MedRsk OBD Top5 Buy Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as medium-risk order book dominant for the &#8216;buy&#8217; side of the market.<\/li>\n    <li><b>Avg MedRsk OBD Top5 Sell Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as medium-risk order book dominant for the &#8216;sell&#8217; side of the market.<\/li>\n    <li><b>LowRsk OBD Clusters<\/b> \u2014 The number of low-risk order book dominance clusters.<\/li>\n    <li><b>Avg LowRsk Score<\/b> \u2014 The average low-risk score.<\/li>\n    <li><b>Avg LowRsk OBD Buy Mkt Dom<\/b> \u2014 The average low-risk order book dominance (OBD) score for the &#8216;buy&#8217; side of the market.<\/li>\n    <li><b>Avg LowRsk OBD Sell Mkt Dom<\/b> \u2014 The average low-risk order book dominance (OBD) score for the &#8216;sell&#8217; side of the market.<\/li>\n    <li><b>Avg LowRsk OBD Top5 Buy Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as low-risk order book dominant for the &#8216;buy&#8217; side of the market.<\/li>\n    <li><b>Avg LowRsk OBD Top5 Sell Qty<\/b> \u2014 The average quantity of the top 5 buy orders identified as low-risk order book dominant for the &#8216;sell&#8217; side of the market.<\/li>\n<\/ul>\n\n\n<h2>Identifying Excessive Bid\/Ask<\/h2>\n\n<p>Using the <a href=\"cv-cluster-view-cluster-scorecard.html\">Cluster Scorecard<\/a>, you can view the details of the\n    activity that triggered the excessive bid\/ask score.<\/p>\n\n\n\n<p><img decoding=\"async\" class=\"img-responsive\" src=\"https:\/\/library-staging.tradingtechnologies.com\/wp-content\/uploads\/2025\/12\/excessive-bid-ask-session-scorecard.png\" alt=\"\"><\/p>\n\n\n<p>For example:<\/p>\n<ol>\n    <li>The model identified a large number of <b>OBD Clusters<\/b>.<\/li>\n    <li>A high value for the <b>Avg HighRsk Score<\/b>.<\/li>\n    <li>A large percentage of the <b>Placed Orders<\/b> were submitted then deleted as shown by the high number of <b>Canceled Orders<\/b>.\n    <\/li><li>The <b>Complete fills<\/b> \u2014 metric is very low when compared to the total <b>Placed Orders<\/b>.<\/li>\n\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>The Excessive Bid\/Ask model looks for when a single trader&#8217;s submitted orders make up the majority of th [&hellip;]<\/p>\n","protected":false},"author":2,"template":"","meta":{"_acf_changed":false,"footnotes":""},"docs-category":[501],"class_list":["post-7245","doc","type-doc","status-publish","hentry","docs-category-trading-behaviors-models"],"acf":[],"_links":{"self":[{"href":"https:\/\/library-staging.tradingtechnologies.com\/ja\/wp-json\/wp\/v2\/doc\/7245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/library-staging.tradingtechnologies.com\/ja\/wp-json\/wp\/v2\/doc"}],"about":[{"href":"https:\/\/library-staging.tradingtechnologies.com\/ja\/wp-json\/wp\/v2\/types\/doc"}],"author":[{"embeddable":true,"href":"https:\/\/library-staging.tradingtechnologies.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"version-history":[{"count":0,"href":"https:\/\/library-staging.tradingtechnologies.com\/ja\/wp-json\/wp\/v2\/doc\/7245\/revisions"}],"wp:attachment":[{"href":"https:\/\/library-staging.tradingtechnologies.com\/ja\/wp-json\/wp\/v2\/media?parent=7245"}],"wp:term":[{"taxonomy":"docs-category","embeddable":true,"href":"https:\/\/library-staging.tradingtechnologies.com\/ja\/wp-json\/wp\/v2\/docs-category?post=7245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}