A simple script that can be used with Obsidian's Dataview plugin to display daily streaks of habits from your daily notes.

Obsidian Daily Streaks.js

// For this script to work properly, each daily habit has to start with a unique emoji,
// which will also be displayed next to the daily streak for each habit.
// Daily streaks are calculated for the currently opened daily note, and end on the first day
// that the habit was not ticked off. They are displayed in order of highest to lowest length.
// To display the result of this script in your daily notes, you can use this snippet:
// ```dataviewjs
// dv.view("path/to/Obsidian Daily Streaks.js");
// ```

// This is the directory that your daily notes are in
const daily = '"path/to/daily/notes"';

let streaks = new Map();
for (let task of dv.current().file.tasks) {
    let emoji = task.text.substring(0, task.text.indexOf(" "));
    streaks.set(emoji, {
        value: 0,
        done: false
    });
}

let foundToday = false;
for (let page of dv.pages(daily).sort(p => p.file.name, "desc")) {
    // skip all notes that are newer than the current note
    if (!foundToday) {
        if (page.file.name == dv.current().file.name)
            foundToday = true;
        continue;
    }

    for (const [emoji, streak] of streaks.entries()) {
        // if a streak is marked as done, it means we reached the end already
        if (streak.done)
            continue;
        for (let task of page.file.tasks) {
            if (!task.text.startsWith(emoji))
                continue;
            if (task.completed) {
                streak.value++;
            } else {
                streak.done = true;
            }
            break;
        }
    }
}

// iterate streaks in order of length and display them
for (let [emoji, streak] of Array.from(streaks.entries()).sort((kv1, kv2) => kv2[1].value - kv1[1].value))
    dv.span(`${emoji} ${streak.value} `);