The AND node is true only when all of its inputs are true. It outputs the smallest of its input values, which is the fuzzy logic AND.
How it works
Connect as many inputs as you need: each time you connect one, another open input appears. The AND node works out the Long and Short sides separately, and each side outputs the smallest value among the inputs.
| Inputs | Output | Why |
|---|---|---|
| 1, 1, 1 | 1 | All true. |
| 1, 1, 0 | 0 | One input is false. |
| 0.5, 0.7 | 0.5 | Fuzzy logic: only as favorable as the least favorable input. |
More on how AND, OR and the fuzzy versions work: Logic primer.
Example
Your trading signal has 5 criteria, and all of them must be true (or favorable, with fuzzy logic) in one direction before you want a signal in that direction. You’ve set up each criterion as its own solver, so there are 5 solver nodes on the Logic Board.
Connect all 5 solvers to the inputs of an AND node, then connect the AND node’s output to the Result node. BloodHound now marks every bar on the chart where all 5 criteria are true at the same time for a direction.
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. |
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.