ROCR — Rate of Change Ratio — `rocr`¶

The ratio of the current price to the price period bars ago (equivalent to 1 + ROC / 100).

Inputs: [real] | Options: [period] | Outputs: [rocr]

Basic¶

RustCGoJavaPythonNode.jsWASM

use tulip_rs::indicators::rocr::{Rocr, Indicator, TIndicatorState};

let close = vec![81.59, 81.06, 82.87, 83.00, 83.61,
                 83.15, 82.84, 83.99, 84.55, 84.36_f64];
let (outputs, mut state) = Rocr::indicator(&[close.as_slice()], &[10.0], None).unwrap();
println!("{:?}", outputs[0]);

// State continuation — feed new bars without reprocessing history
let partial = close[..8].to_vec();
let (outputs2, mut state) = Rocr::indicator(&[partial.as_slice()], &[10.0], None).unwrap();
println!("{:?}", outputs2[0]);

let new_close = vec![85.53_f64];
let continued = state.batch_indicator(&[new_close.as_slice()], &[10.0], None).unwrap();
println!("{:?}", continued[0]);

#include "tulip_rs_ffi.h"

double close[] = {81.59, 81.06, 82.87, 83.00, 83.61,
                  83.15, 82.84, 83.99, 84.55, 84.36};
double options[ROCR_OPTIONS] = {10.0}; // period
const double *inputs[ROCR_INPUTS] = {close};

/* Full computation (check r.error == C_INDICATOR_ERROR_OK in real code) */
CIndicatorResult r = rocr_indicator(inputs, 10, options, NULL, 0);
tulip_ffi_result_free(r);
rocr_state_free(r.state);

/* Partial computation + state continuation */
CIndicatorResult p = rocr_indicator(inputs, 8, options, NULL, 0);
double new_close[] = {85.53};
const double *new_inputs[ROCR_INPUTS] = {new_close};
CBatchResult b = rocr_batch(p.state, new_inputs, 1, NULL, 0);
tulip_ffi_batch_result_free(b);
tulip_ffi_result_free(p);
rocr_state_free(p.state);

import "github.com/me60732/tulip_rs_go/indicators"

close := []float64{81.59, 81.06, 82.87, 83.00, 83.61,
                   83.15, 82.84, 83.99, 84.55, 84.36}
options := []float64{10.0}

// Full computation — Rows are zero-copy views, valid until Close.
res, st, _ := indicators.Rocr.Indicator(close, options, nil)
fmt.Println(res.Rows[0]) // ROCR(10) values
res.Close()
st.Close()

// Partial computation + state continuation.
res2, st2, _ := indicators.Rocr.Indicator(close[:8], options, nil);
res2.Close() // outputs consumed or closed; state stays live
batch, _ := st2.Batch(close[8:], nil);
fmt.Println(batch.Rows[0]) // continued ROCR values
batch.Close()
st2.Close();

import org.tuliprs.*;
import org.tuliprs.indicators.Rocr;

double[] close = {81.59, 81.06, 82.87, 83.00, 83.61,
                  83.15, 82.84, 83.99, 84.55, 84.36};
double[] options = {10.0};

// Full computation — output rows are zero-copy views, valid until close().
Outcome oc = Rocr.indicator(new double[][] {close}, options);
try (Result res = oc.result(); State st = oc.state()) {
    System.out.println(java.util.Arrays.toString(res.toDoubleArray(0))); // ROCR(10) values
}

// Partial computation + state continuation.
int n = 8;
Outcome p = Rocr.indicator(new double[][] {java.util.Arrays.copyOfRange(close, 0, n)}, options);
try (Result pr = p.result(); State st = p.state()) {
    Result br = st.batch(new double[][] {java.util.Arrays.copyOfRange(close, n, 10)});
    try (br) {
        System.out.println(java.util.Arrays.toString(br.toDoubleArray(0))); // continued ROCR values
    }
}

outputs, state = tulip_rs.indicators.rocr.indicator([close], [10.0])
print(outputs[0])

import * as ti from 'tulip-rs-node';

const close = Float64Array.from([81.59, 81.06, 82.87, 83.00, 83.61,
               83.15, 82.84, 83.99, 84.55, 84.36,
               85.53, 86.54, 86.89, 87.77, 87.29]);

const [outputs, state] = ti.rocr.indicator([close], [10]);
console.log('ROCR(10):', outputs[0]);

// State continuation
const [, state2] = ti.rocr.indicator([close.slice(0, -5)], [10]);
const continued = state2.batchIndicator([close.slice(-5)]);
console.log('Continued ROCR:', continued[0]);

import { init } from 'tulip-rs-wasm';
import * as ti from 'tulip-rs-wasm';

await init(); // bundler resolves the WASM asset automatically

const close = [81.59, 81.06, 82.87, 83.00, 83.61,
               83.15, 82.84, 83.99, 84.55, 84.36,
               85.53, 86.54, 86.89, 87.77, 87.29];

const [outputs, state] = ti.rocr.indicator([close], [10]);
console.log('ROCR(10):', outputs[0]);

// State continuation
const [, state2] = ti.rocr.indicator([close.slice(0, -5)], [10]);
const continued = state2.batchIndicator([close.slice(-5)]);
console.log('Continued ROCR:', continued[0]);

SIMD¶

RustCGoJavaPythonNode.js

By assets — same options, N assets in parallel:

use tulip_rs::indicators::rocr::{Rocr, Indicator};

let inputs: [&[&[f64]; 1]; 4] = [&[a1.as_slice()], &[a2.as_slice()], &[a3.as_slice()], &[a4.as_slice()]];
let results = Rocr::indicator_by_assets::<4>(&inputs, &[10.0], None).unwrap();
for (i, asset_outputs) in results.iter().enumerate() {
    println!("Asset {}: {:?}", i + 1, asset_outputs[0]);
}

By options — same asset, N option sets in parallel:

use tulip_rs::indicators::rocr::{Rocr, IndicatorByOptions};

let opts: [&[f64; 1]; 4] = [&[5.0], &[10.0], &[20.0], &[50.0]];
let results = Rocr::indicator_by_options::<4>(&[close.as_slice()], &opts, None).unwrap();
for (i, asset_outputs) in results.iter().enumerate() {
    println!("Option {}: {:?}", i + 1, asset_outputs[0]);
}

By assets — same options applied to 4 assets in parallel:

double a1[] = {81.59, 81.06, 82.87, 83.00, 83.61, 83.15, 82.84, 83.99, 84.55, 84.36};
double a2[] = {86.59, 86.06, 87.87, 88.00, 88.61, 88.15, 87.84, 88.99, 89.55, 89.36};
double a3[] = {78.59, 78.06, 79.87, 80.00, 80.61, 80.15, 79.84, 80.99, 81.55, 81.36};
double a4[] = {83.22, 82.68, 84.53, 84.66, 85.28, 84.81, 84.50, 85.67, 86.24, 86.05};

const double *asset1[ROCR_INPUTS] = {a1};
const double *asset2[ROCR_INPUTS] = {a2};
const double *asset3[ROCR_INPUTS] = {a3};
const double *asset4[ROCR_INPUTS] = {a4};
const double *const *const simd_inputs[4] = {asset1, asset2, asset3, asset4};

CSimdResult r = rocr_simd_by_assets(simd_inputs, 4, 10, options, NULL, 0);
for (uintptr_t i = 0; i < r.num_results; i++) {
    rocr_state_free(r.states[i]);
}
tulip_ffi_simd_result_free(r);

By options — same asset, N option sets in parallel:

double close_expanded[40];
for (int i = 0; i < 4; i++) {
    for (int j = 0; j < 10; j++) close_expanded[i * 10 + j] = a1[j];
}
const double *expanded_inputs[ROCR_INPUTS] = {close_expanded};

double o5[] = {5.0}, o10[] = {10.0}, o20[] = {20.0}, o50[] = {50.0};
const double *const simd_opts[4] = {o5, o10, o20, o50};

CSimdResult r = rocr_simd_by_options(expanded_inputs, 40, simd_opts, 4, NULL, 0);
for (uintptr_t i = 0; i < r.num_results; i++) {
    rocr_state_free(r.states[i]);
}
tulip_ffi_simd_result_free(r);

By assets — same period applied to 4 assets in parallel (lane counts 2/4/8/16):

a1 := []float64{81.59, 81.06, 82.87, 83.00, 83.61, 83.15, 82.84, 83.99, 84.55, 84.36}

// Reuse the same data for assets 2–4 in this example
a2, a3, a4 := a1, a1, a1

assets := [][indicators.RocrInputs][]float64{{a1}, {a2}, {a3}, {a4}}
sim, _ := indicators.Rocr.SimdByAssets(assets, []float64{10.0}, nil)
for i, lanes := range sim.Results {
    fmt.Printf("Asset %d: %v\n", i+1, lanes[0])
}
sim.Close() // frees every lane state, then the SIMD buffers

By options — same asset, 4 different periods in parallel:

close := []float64{81.59, 81.06, 82.87, 83.00, 83.61,
                   83.15, 82.84, 83.99, 84.55, 84.36}
sim2, _ := indicators.Rocr.SimdByOptions(close, [][]float64{{5}, {10}, {20}, {50}}, nil)
for i, lanes := range sim2.Results {
    fmt.Printf("Period set %d: %v\n", i+1, lanes[0])
}
sim2.Close()

By assets — same period applied to 4 assets in parallel (N must be 2, 4, 8, or 16):

import org.tuliprs.*;
import org.tuliprs.indicators.Rocr;

double[] a1 = {81.59, 81.06, 82.87, 83.00, 83.61, 83.15, 82.84, 83.99, 84.55, 84.36};
double[] a2 = {86.59, 86.06, 87.87, 88.00, 88.61, 88.15, 87.84, 88.99, 89.55, 89.36};
double[] a3 = {78.59, 78.06, 79.87, 80.00, 80.61, 80.15, 79.84, 80.99, 81.55, 81.36};
double[] a4 = {83.22, 82.68, 84.53, 84.66, 85.28, 84.81, 84.50, 85.67, 86.24, 86.05};

// One entry per asset; each asset lists its INPUTS series.
double[][][] assets = {{a1}, {a2}, {a3}, {a4}};
try (SimdResult sim = Rocr.simdByAssets(assets, new double[] {10.0}, null)) {
    for (int i = 0; i < sim.numResults(); i++) {
        System.out.printf("Asset %d: %s%n", i + 1,
            java.util.Arrays.toString(sim.toDoubleArray(i, 0)));}
}   // frees every lane state, then the SIMD buffers (contractual order)

By options — same asset, 4 different periods in parallel:

import org.tuliprs.*;
import org.tuliprs.indicators.Rocr;

double[] close = {81.59, 81.06, 82.87, 83.00, 83.61,
                  83.15, 82.84, 83.99, 84.55, 84.36};

try (SimdResult sim = Rocr.simdByOptions(new double[][] {close},
        new double[][] {{5}, {10}, {20}, {50}}, null)) {
    for (int i = 0; i < sim.numResults(); i++) {
        System.out.printf("Period set %d: %s%n", i + 1,
            java.util.Arrays.toString(sim.toDoubleArray(i, 0)));}
}

By assets — same options, N assets in parallel (must be 2, 4, 8, or 16):

simd_inputs = [[a1], [a2], [a3], [a4]]
outputs_list, states = tulip_rs.indicators.rocr.simd_by_assets(simd_inputs, [10.0])

By options — same asset, N option sets in parallel:

simd_options = [[5.0], [10.0], [20.0], [50.0]]
outputs_list, states = tulip_rs.indicators.rocr.simd_by_options([close], simd_options)

By assets — same period applied to 4 assets in parallel:

const simdInputs = [[close.slice()], [close.map(v => v * 1.1)], [close.map(v => v * 0.9)], [close.map(v => v * 1.02)]];
const [results] = ti.rocr.simdByAssets(simdInputs, [10]);
results.forEach((out, i) => console.log(`Asset ${i + 1}:`, out[0]));

By options — same asset, 4 different periods in parallel:

const simdOptions = [[5], [10], [20], [50]];
const [results] = ti.rocr.simdByOptions([close], simdOptions);
results.forEach((out, i) => console.log(`Period ${simdOptions[i][0]}:`, out[0]));

ROCR — Rate of Change Ratio — rocr¶

Basic¶

SIMD¶

ROCR — Rate of Change Ratio — `rocr`¶