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Syntax Overview

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Summary: The syntax for writing conditions and formulas combine references to the data product name, the name of the property, and the time frame.
Introduction
Different bots running within the system produce data products that others may consume. These products are available for you to use within your strategies.
Datasets are stored as a collection of sequential records and you may access any of the properties (fields) of each record.
To do that, you will use the following syntax: 
 .productName + .propertyName.
The above syntax returns the value of the property of the declared product at the latest closed candle. This is common throughout all available datasets.
Specifying the Time Frame
When building conditions and formulas, you may want to use analysis concerning different time frames. This is perfectly possible.
The variables explained further down this section, written as described for each indicator, are not valid unless they are proceeded by the declaration of the time frame they refer to.
To do that, you need to proceed the above syntax with the following: 
 chart.at + time frame
Therefore, the complete syntax to build a valid statement is: 
 chart.at + time frame + .productName + .propertyName
For example: 
 chart.at04hs.candle.close > chart.at04hs.candle.previous.close
The above statement compares the current 4 hours candle to the previous 4 hours candle.
The complete list of time frames available is:
Time Frame Syntax
1 min chart.at01min
2 min chart.at02min
3 min chart.at03min
4 min chart.at04min
5 min chart.at05min
10 min chart.at10min
15 min chart.at15min
20 min chart.at20min
30 min chart.at30min
40 min chart.at40min
45 min chart.at45min
1 h chart.at01hs
2 hs chart.at02hs
3 hs chart.at03hs
4 hs chart.at04hs
6 hs chart.at06hs
8 hs chart.at08hs
12 hs chart.at12hs
24 hs chart.at24hs
Previous Property
Previous Property
The previous property is a property common to all products that allows you to retrieve the value of the candle that closed previous to the last one.
The property is used with the following syntax: 
 chart.at + time frame + .productName + .previous + .propertyName.
You may use the property on any of the indicators in a similar way.
In addition, you may use the previous property more than once, to retrieve values further in the past: 
 chart.at + time frame + .productName + .previous.previous... 
...previous + .propertyName
For example: 
 chart.at01hs.candle.previous.previous.max
The above returns the maximum value of two candles before the last closed candle at the 1-hour chart.
Alternative to the Previous Property
There is a cool alternative to the previous property, that you can use to fetch the value of a property beyond the last closed candle.
The syntax is: 
 productName[tradingEngine.tradingCurrent.tradingEpisode.candle.index.value-n].propertyName
... where tradingEngine.tradingCurrent.tradingEpisode.candle.index.value represents the last closed candle and n may be replaced by any integer number.
For example: 
 chart.at01hs.candle[tradingEngine.tradingCurrent.tradingEpisode.candle.index.value-5].max
... retrieves the maximum value of the fifth candle previous to the last closed candle at the 1-hour chart.
Comparison and Logical Operators
To define conditions you will use statements using the syntax described above. You will use the properties of indicators that will be introduced later on. The data behind those indicators describe what is happening with the market.
Remember, conditions need to evaluate either true or false.
To create such statements you will use comparison and logical operators:
Operator Description
=== equal value and equal type
!= not equal
> greater than
< less than
>= greater than or equal to
<= less than or equal to
&& and
∣∣ or
For example:
Situation 1
  • Condition A: The latest candle at the 1 hour chart closed above the Bollinger Bands moving average. 
 chart.at01hs.candle.close > chart.at01hs.bollingerBand.MovingAverage
  • Condition B: The maximum value of the candle before the last one, was higher than the Bollinger Bands moving average. 
 chart.at01hs.candle.previous.max > chart.at01hs.bollingerBand.previous.MovingAverage
In the example above, conditions A and B are comparison statements that may evaluate either true or false. In the case both would evaluate true then Situation 1 would be true as well.
Situation 2
  • Condition C: The entire candle at the 4 hours chart fits within the price range between 9000 and 10000. 
 chart.at04hs.candle.max <= 10000 && chart.at04hs.candle.min >= 9000
In the example above, condition C would be true if the whole 4-hour candle falls within the range between 9000 and 10000. If this is true, then situation 2 is true as well, as there is only one condition to check.
JaveScript Code
You may use any valid piece of JavaScript code for your conditions and formulas. The system imposes no constraints whatsoever. The code on conditions and formulas is run through the eval() function, as follows: 
 try {
    let code = node.code
    value = eval(code);
    addCodeToSnapshot(code)
}
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Situations, Conditions, and Formulas
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Accessing Runtime Data

Trading Logic — TOC

You just read page 2 in the topic.

1. Situations, Conditions, and Formulas

2. Syntax Overview

3. Accessing Runtime Data

4. Accessing Trading System Definitions and Session Parameters