The Log Block retrieves information specified by the user.

Operations

1. A discrete event message triggers the Log Block.
2. Upon trigger, the Log Block retrieves the information specified by the user (defined by double-clicking on the block). The user may extract information contained within the or retrieve information unrelated to .

3. The retrieved information is displayed in the Log tab of the Information Panel as shown below.

   Example. Information display in the Log Tab

   

4. Afterwards, the Log Block passes on the original message ,unchanged, through its right-side port.

Note: Because the Log Block displays information only in the Designer canvas, this block is useful only as a testing tool. Its presence on the canvas will not affect the actual speed or the performance of an actual algorithm in live execution.

Double-Click Edit Window

Double-click on the block to bring up an edit window:

• Clicking on the formula link will display a green canvas where the user can define an equation which will determine the specific value to be retrieved and displayed in the Information Panel at the moment the block is triggered by .
• By dragging the icon onto the canvas, the user can write free-form text that will also be displayed in the Information Panel. However, a “+” icon needs to be placed in order to string together the icon and an operator icon, a Message Info icon, or a Block Value icon.

Internalized Logic Canvas

Internalized Logic Canvas: Several blocks in ADL contain an internalized logic canvas which can be accessed by double-clicking on the block.

Example. Internal Logic Canvas

The canvas is used to define user-made equations which will play an important role in the overall operation of the respective block. The following icons can be dragged onto the green canvas to define an equation:

• : These icons can be linked to define an arithmetic equation or a True/False statement.
• : By dragging the  icon onto the canvas, the user can write free-form text that will also be displayed in the Information Panel. However, a “+” icon needs to be dragged onto the canvas in order to string together the  icon and an operator icon, a Message Info icon, or a Block Value icon.
• : The Block Value Icon allows the user to reference the output of any other block in the algorithm. When dragged onto the canvas, the Block Value Icon will display a menu from which the user will be able to choose a block within the algorithm (except for the blocks contained in a virtualized block).

• : The Message Info Icon allows the user to extract certain information embedded within a discrete event message, such as a Fill Confirmation Message. When dragged onto the canvas, the Message Info Icon will display the following selectable fields:

  Field	Description
  Limit	The price of the respective order or the order about to be submitted
  OrderQty	The total order quantity of the respective order or the order about to be submitted
  WorkingQty	The working quantity of the respective order or the order about to be submitted
  FillPrice	Fill price
  FillQty	Fill quantity
  Instrument	Instrument of the submitted order
  ExeQty	Total filled quantity of the respective order
  DisclosedQty	The disclosed quantity or percentage (%) of total goal quantity viewable to the market
  DeletedQty	The canceled quantity of the deleted order or the order about to be deleted
  IsBuy	When this field is selected, the respective block will evaluate the user's fill confirmations messages (not trade data message disseminated by the exchange) and will output a Boolean value of TRUE if the user's fill was a buy side execution
  StopTrigger	The price at which the respective stop-limit or stop-market order is activated
  TradeQty	Quantity of the last trade for a specific instrument
  TradePrice	Price of the last trade for a specific instrument
  IsQuotingOrder	Applies to discrete event messages generated by an ASE Order Block. The field will output a Boolean value of TRUE if the message was generated from an order submission for the quote leg of the respective spread
  IsHedgeOrder	Applies to discrete event messages generated by an ASE Order Block. The field will output a Boolean value of TRUE if the message was generated from an order submission for the hedge leg of the respective spread
  User Field 1 - 4	An empty field that can be populated with a value using a Value Injector Block. The value may then be extracted using a Value Extractor Block