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11:48, 22 March 2012 ==Exchange Traded Spreads==
In MC one is able to trade on a spread only if it is exchange traded spread and it is provided by your data vendor as a single separate instrument that is added to QuoteManager database (see Adding Symbols to Database) and mapped correctly to the corresponding broker instrument in [[Symbol Mapping]] window. If there is no such instrument on data source end and at your broker, then it is not possible to trade exactly on spread.
==Pair Trading==
One can only send orders to buy or sell one or another instrument of a pair in MultiCharts, but to reach this goal the following system should be developed.
* 2 separate chart windows should be plotted. 1 symbol of a pair per chart.
* 2 separate signals should be applied to each of the charts.
* Each signal script should use [[Global Variables]] in its script to pass values between the charts.
<div style="background-color: #E5F6FF;">'''Example''': When on first chart a particular condition for order generation is met and the strategy sends a market order to go 1 contract long, through Global Variables this strategy informs the other signal on the second chart to generate a market order to go 1 contract short. </div>