Crossover Solver – SharkIndicators

The Crossover solver signals when Input A crosses Input B, in the direction of Input A: Long when A crosses above B, Short when it crosses below.

For example: a fast moving average crossing a slow one, price crossing a moving average, or the Stochastics K crossing the D.

Properties tab

The essential settings for the node.

Modifiers

Buttons for the most common output modifiers. They change only the selected instance of a node on a Logic Board, so they appear only when a node is selected there, not when a solver is selected in the Solvers panel. That keeps the solver’s original output unchanged everywhere else it’s used, much like changing an SMA’s plot color on one chart leaves it unchanged on your other charts.

Button	What it does
Enable	Turns the node on or off. When it’s off, the node is left out of the system’s calculations. It still looks connected on the Logic Board, but it’s ignored.
Invert	Inverts the node’s output. The same calculation as the Inverter function node, without its extra options.
Swap	Swaps the outputs: Long becomes Short and Short becomes Long. The same as the Long/Short Modifier function node with Mode: Swap.

Global Properties

These settings apply to every instance of the solver: change one instance and they all change. To change just one, make a copy of the solver. The copy is a separate solver, with a number added to the end of its name.

Behavior

Turns off the Long or the Short output.

Setting	What it does
Evaluate	Which outputs the solver calculates. Both: Long and Short. Long only: only Long; the Short output is removed. Short only: only Short; the Long output is removed.

Input A

The first value the solver evaluates, compared with Input B. Choose a data type in the Type menu; the settings below it change to match.

Type	What it evaluates
Indicator Value	Any installed indicator with a plot or Series<T> output, chosen in the Select Indicator window. The default and most used type. Displacement reads the value from a number of bars back.
Price	A bar price (Open, High, Low, Close, or the Body Top, Median or Bottom), optionally processed over a lookback period.
Volume	The current bar’s volume.
Swing Point Prices	Prices from the latest swing highs and lows.
Linear Regression Channel	The upper, middle or lower line of a regression channel.
Fixed Value	A single value that never changes. Only useful for solvers with two inputs, such as Comparison.

Every type and its settings in full: Data type selection.

Input B

The second value, compared with Input A. It has the same data types and settings as Input A.

Settings

Setting	What it does
Crosses Occur When Equal	Counts it as a cross when the inputs only touch (become equal) where they would cross, without actually crossing.
Lookback Period	How many bars back to look for a cross. In effect, the signal extends forward on the chart by this many bars.

Output

The output value for each situation, for the Long and Short sides.

Setting	What it does
Crosses In Direction	The Long output when A crosses above B, and the Short output when A crosses below B.
Crosses Against Direction	The opposite: the Short output when A crosses above B, and the Long output when A crosses below B.
Output Decreases as Crossover Ages By	Reduces the output by this amount on each bar after the cross, until it reaches zero or the Lookback Period ends.
No Crossover	The value of the Long output and the Short output when there is no cross. The Lookback Period must pass first.

Options tab

Secondary settings shared by all nodes.

Weight

Changes the node’s final output value. Only needed when designing a fuzzy logic system, or a fuzzy logic part of a system.

How Weight works

Weight changes only the selected instance of a node on a Logic Board. So the controls appear only when a node is selected there, not when a solver is selected in the Solvers panel: a solver’s original output can’t be changed globally.

Control	What it does
Multiply Output	Multiplies the node’s internal Long and Short values (set by the Output Rules on the Properties tab) by this number. The final output still can’t go above 1 (see Slider).
Slider	Limits the final output to between 0 and 1. The left handle sets a minimum output, given whether or not the condition is true. The right handle sets the maximum; the output is capped there.
Hedge Operation	Applies a formula to the internal value. None: unchanged. Very: squares it (value²). Somewhat: takes the square root (√value).

Example: two out of three

Three solvers check three indicator conditions, but only two need to be true. Connect them to an Additive logic node and set each solver’s maximum (the slider’s right handle) to 0.5. When any two are true, the Additive node adds 0.5 + 0.5 + 0 = 1, which means the two-out-of-three condition is met.

Description

Free text for describing what the node does or what it’s for. The Description is shared by every instance of the node, unlike Weight, which is set per instance.

Help tab

Shows this page for the selected node, inside BloodHound. Click the node’s image at the top of the page to open it in a bigger window. The built-in web viewer needs NinjaTrader 8.0.26.0 or newer.

Tutorial videos

From the weekly training workshop, June 2015. It shows BloodHound v1, but the settings and how they work are the same.

A simple example: detecting price crossing a moving average.

Examples

Example 1: The basics

Long when the SMA 10 crosses above the EMA 30, Short when it crosses below.

Settings and chart

Settings

Add the Crossover solver to the Logic Board and connect it to the Result node.
Set Input A » Indicator to SMA 10.
Set Input B » Indicator to EMA 30.

Result

A Long signal when the SMA 10 crosses above the EMA 30, and a Short signal when it crosses below.

Example 2: A threshold filter

The Stochastics K crossing the D, with longs allowed only while the D is below 40 and shorts only while it is above 60. Shows combining two solvers with a Ratio node, then an AND node.

Settings and chart

Crossover solver