---
title: "Running the engine — Trading Analytics for Laravel | Roundly"
description: "Run the engine through the TradingAnalytics facade — set precision and win-rate period, pick metrics, and calculate in one pass."
url: https://roundly-consulting.com/open-source/docs/trading-analytics-for-laravel/running-analytics
language: en
---

[All packages](https://roundly-consulting.com/open-source.md)

[Trading Analytics for Laravel](https://roundly-consulting.com/open-source/docs/trading-analytics-for-laravel.md)

# Running the engine

Hand TradingAnalytics::for() a trade source — Trade objects, rows of any shape Trade::fromRow() reads, a mix, or an ordered query — configure the run and call calculate(); or build and run in one call with TradingAnalytics::calculate(). The engine makes a single pass: it runs every active calculator for each trade, then lets each calculator finish its figures. It holds no per-trade history, so memory stays flat however long the history is:

```php
use Illuminate\Support\Facades\DB;
use RoundlyConsulting\TradingAnalytics\Analytics\Counts;
use RoundlyConsulting\TradingAnalytics\Analytics\Streaks;
use RoundlyConsulting\TradingAnalytics\Facades\TradingAnalytics;

// Build, configure, run
$analytics = TradingAnalytics::for($trades)
    ->scale(5)        // decimal places of every amount, default 10 (see Precision)
    ->calculate();    // returns the Analytics instance

// Or build and run in one call, optionally restricted to some metrics
$analytics = TradingAnalytics::calculate(DB::table('trades')->orderBy('close_time')->orderBy('id'));
$analytics = TradingAnalytics::calculate($rows, only: [Counts::class, Streaks::class]);

$analytics->hasBeenCalculated(); // true
$analytics->toArray();           // the full result matrix as a nested array
```

for() returns the Analytics engine, ready to configure. Its fluent methods:

- scale(int) — decimal places of every amount in this run (default from config, 10; see Precision). A negative scale throws InvalidScaleException; getScale() reads it back.
- usingWinRatePeriod(Period) — the bucket for win rate by period (default from config, daily).
- only(\[...\]) / except(\[...\]) — choose the calculators to run.
- onEachTrade() / afterTrades() — hooks into the calculation.
- calculate() — runs the pass and returns the instance; realized trades must arrive in close-time order (see Trade order). hasBeenCalculated() reports whether it has run; toArray() returns \[\] until it has.

## A worked example

The examples throughout these docs use these three fictional trades, in close-time order, at ->scale(2):

```php
use RoundlyConsulting\TradingAnalytics\DataTransferObjects\Trade;
use RoundlyConsulting\TradingAnalytics\Facades\TradingAnalytics;

// Three fictional, closed trades used by the examples in these docs
$trades = Trade::collect([
    ['base_currency' => 'BTC', 'quote_currency' => 'USD', 'open_price' => '40000', 'close_price' => '42000',
     'size' => '0.5', 'direction' => 'buy', 'open_time' => '2024-03-01 09:00', 'commission' => '10',
     'close_time' => '2024-03-01 15:00'],
    ['base_currency' => 'ETH', 'quote_currency' => 'USD', 'open_price' => '3000', 'close_price' => '3150',
     'size' => '2', 'direction' => 'sell', 'open_time' => '2024-03-02 10:00', 'commission' => '6',
     'close_time' => '2024-03-02 12:00'],
    ['base_currency' => 'ETH', 'quote_currency' => 'USD', 'open_price' => '3100', 'close_price' => '3200',
     'size' => '1', 'direction' => 'buy', 'open_time' => '2024-03-04 08:00', 'commission' => '3',
     'close_time' => '2024-03-05 08:00'],
]);

$analytics = TradingAnalytics::for($trades)->scale(2)->calculate();

(string) $analytics->counts->global->total;                          // '3'
(string) $analytics->realizedProfitAndLoss->gross->global->total->total; // '800.00'
(string) $analytics->realizedProfitAndLoss->net->global->total->total;   // '781.00'
(string) $analytics->wins->winRatio->global->total;                  // '0.66'
(string) $analytics->profitFactor->total;                            // '3.66'
(string) $analytics->maxDrawdown->value;                             // '306.00'
```

Prefer an injected manager or the engine class itself? See The TradingAnalytics facade and Without the facade.

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