Disclosure: this post is written by the team behind KDP Quick Scout. The workflow below works with any research method. We mention our tool where it genuinely fits.
Most authors look at a niche analysis and fixate on the score. A number between 1 and 10 feels decisive. But the score is a summary, not the insight. The real value is in the signals that produced it.
Here are six signals to read carefully before you commit to a niche.
1. Demand: what the BSR actually tells you
Best Sellers Rank is the single most reliable demand signal on Amazon. It tells you how many copies a book is selling relative to everything else on the platform.
What to look for:
- Main BSR under 50,000: consistent demand. Multiple books at this level means readers are actively buying in this niche.
- Main BSR 50,000 to 200,000: moderate demand. Some books sell, but the ceiling is lower.
- Main BSR above 200,000: thin demand. A few books might sell occasionally, but the market is not proven.
The subcategory BSR is less useful on its own. A book ranked #2 in “Cozy Mystery with Cats” might be selling 30 copies a month, while #2 in “Mystery, Thriller & Suspense” might be selling 2,000. Always check the main Books BSR for sales estimates.
A good analysis gives you an estimated monthly sales range, not a single number. That range reflects real uncertainty. Use the lower end of the range as your baseline and the upper end as your upside scenario.
2. Competition: how many books are already winning
The competition level in a niche analysis tells you how hard it is to break into the top results. But “high competition” means different things in different niches.
What to look for:
- Number of competitors: how many books have significant review counts (100+ reviews)?
- Review distribution: are the top books at 500+ reviews, or are they at 50 to 200? Lower review counts mean a lower barrier to entry.
- Gap analysis: are there specific sub-niches or reader needs that the current top books do not serve?
A niche with 20 books at 2,000+ reviews is harder to break into than a niche with 20 books at 200 reviews. The raw count matters less than the review tier.
Also check the “entry barriers” section. Some niches have structural barriers, like requiring a long series (6+ books) before readers start paying attention. That is not a reason to avoid the niche, but it changes your timeline and budget.
3. Kindle Unlimited presence: how readers consume
Kindle Unlimited (KU) presence tells you how readers in this niche discover and consume books. The share of top listings enrolled in KU reveals the dominant distribution model.
What to look for:
- High KU presence (60%+ of top listings): readers in this niche heavily use KU. You will likely need KU enrollment to compete. Page reads, not direct sales, will be your primary revenue source.
- Low KU presence (under 30%): readers buy directly. Pricing strategy and cover quality matter more than KU enrollment.
- Mixed presence: both models work. You can choose based on your strategy.
A good analysis will ground this in real data: “77% of 31 top listings are in Kindle Unlimited.” That sample size matters. A claim based on 5 listings is less reliable than one based on 30.
If the analysis says “Kindle Unlimited presence: not determined on this marketplace,” that is honest, not a failure. Some marketplaces do not reliably show the KU badge in search results.
4. Saturation: is the niche growing or closing
Saturation measures how many books are competing for the same readers. But saturation without demand context is misleading.
What to look for:
- Low saturation + proven demand: the best-case scenario. Few competitors, active readers.
- High saturation + proven demand: competitive but viable. You need a clear differentiation angle.
- Oversaturated + no gaps: the hardest scenario. Many competitors, no obvious opening.
The key question is not “is this niche saturated?” but “are there specific gaps in this saturated niche?” A niche with 30 active series can still have room for a book that serves an underserved reader need.
Look at the differentiation suggestions. If the analysis can name 3 or more specific angles that are not yet represented in the top results, the niche has room. If it cannot, the niche is likely too crowded for a new entrant.
5. Recommendation: what the verdict actually means
A good analysis does not just give you a score. It gives you a recommendation: Pursue, Watch, or Reject.
- Pursue: the niche has proven demand, beatable competition, and a realistic path to profitability. Move forward.
- Watch: the niche has potential but meaningful barriers. Monitor it, or enter only if you have a specific edge.
- Reject: the niche lacks demand, has overwhelming competition, or both. Look elsewhere.
The rationale behind the recommendation matters more than the label. Read it carefully. A “Reject” with a specific reason (e.g., “8+ established series averaging 4,000+ reviews each”) is more useful than a vague “Proceed with caution.”
6. Confidence: how much of this is real data
Every number in a niche analysis falls into one of two categories: grounded or estimated.
Grounded means the analysis found real competing listings on Amazon and computed the metric from them. The report will say something like “4.3/5 avg across 14 real listings.” You can independently check those 14 listings yourself.
Estimated means the AI filled in the gap with an educated guess. This happens when the scraper cannot find enough competing data, common in small or unusual niches. The analysis will label these as “estimated” or omit the sample size.
What to do with this:
- If the confidence is high and most benchmarks are grounded, the analysis is reliable enough to act on.
- If the confidence is medium or low, treat the benchmarks as directional. The recommendation and competition level are still useful, but do not stake your strategy on an estimated sales number.
- A niche with zero real competing data is harder to evaluate. That does not mean avoid it, it means you are making a higher-risk bet and should supplement the analysis with your own manual research.
Putting it together
A niche analysis is not a crystal ball. It is a structured evaluation of market conditions at a specific point in time. The six signals above give you the raw material to make your own decision.
The best authors use niche analysis as a starting point, not an endpoint. The report tells you what the market looks like today. Your job is to decide whether you can create something that serves readers better than what already exists.
If the signals line up and you see a gap you can fill, that is a niche worth writing in.