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The majority of data providers have a limitation on the number of simultaneous real-time data subscriptions. This made scanning numerous markets almost impossible.The new version of our Scanner has two components: Pre-Scanning and Watchlist windows. You can scan more than 5000 symbols one by one with a specified frequency (every minute, 5 minutes, hour….) or just hit Rescan Now. According to your filters in Pre-Scanning instruments that satisfy the conditions will be shown in Watchlist window for updating in real-time.
<div style="background-color: #E3FBE5;">'''Note''': By default Autotrading is not supported in the Scanner window. Only indicators can be used. It is, however, possible to use the Scanner for trading in MultiCharts .NET. See how to do that in [https://www.multicharts.com/discussion/viewtopic.php?t=11028 this forum thread]. </div>
[[File:MainWindow.png]]
When Scanner Window is opened for the first time, a Watchlist field is shown by default.
[[File:TopEmpty.png]]
To open Pre-Scanning click the '''SHOW Pre-Scanning''' text at the top of the Scanner Window.
* The new scanner concept contains consists of two parts (see screenshots below):
# Watchlist (bottom window) that is a standard version of MultiCharts Scanner;
# Pre-Scanning (top window) that requests both historical and realtime snapshot data after a certain time interval pre-set by a user. The instruments satisfying the conditions can be copied into Watchlist.
[[File:FullWindowEmpty.png]]
<br><br>==Setting up scanning criteriaScanning Criteria==
===Scanning Criteria toolbar===
# '''Rescan now''' / '''Stop Scan''' button.
# '''Every''' check box,.# '''Time''' period selector,.# '''Min'''/'''Hr''' selector,.# '''Select''' checkbox, .# '''Top''' / '''Bottom''' selector,.# '''Instruments to copy''' selector,.# '''Criteria''' list,.# '''Sort in ascending/descending order''' button,.# '''Use Constrain Condition''' ceckbox,checkbox.# '''Comparison type''' list,.
# '''Compared value''' input field.
<br>
===Selection of Scanning Criteria===
Criteria toolbar represents a statement with adjustable clauses that allow customization of the scanning criteria:
**After checking '''and use constrain''' checkbox select a price or indicator value, comparison type and compared value.
===Starting Pre-Scanning=== When instruments are added into Pre-Scanning Part of the Scanner Window and the pre-scanning criteria is set, scanning can be started. To start scanning click the '''Rescan now''' button.
'''Rescan now''' button initiates both historical and realtime snapshot data requests. The data is requested partially depending on the limitation of the data source thus the data is received for a numerous instruments without breaking the limitations of data source.
Once '''Rescan now''' button is clicked, it changes to '''Stop Scan'''. At this moment, historical and real-time data request is requests are sent for the number of the instruments added into the historical part of the scanner window. As soon as all the historical requested data is obtained, instruments will be unsubscribed from the data source and data will be requested for the next set of instruments. The results are evaluated by the scanning criteria and satisfying instruments are copied into the Real-Time Watchlist part of the scanner window.
<div style="background-color: #E3FBE5;">Note: The instruments will be copied into the Real-Time scanner only after all the historical data is obtained and all the studies are calculated on this data.</div>
===Scanner Window Status Line===
Status line shows:
* If '''and every''' checkbox is enabled historical scanning will be repeated in the set period of time. In this case, the countdown until the next scan will be shown in the Scanner Window status line.
===Working with Scanner in offline modeOffline Mode===
In order to speed up the process of historical scanner backfill in offline mode the instrument will be unsubscribed after either complete historical data backfill or after a certain timeout thus letting the other instruments be backfilled sooner.
[[Category: Real-Time Market Scanner]]