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waterpik replacement heads
Skip itBrand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible13.3%search→purchase rate — share of searches ending in a sale
Returns
Great1.2%return rate — above 5% kills the launch gate
Market size
Great$1.2M$1.2M/yr · 767K searches
Avg price
Good$12.18avg listing price — sweet spot $15–$100
Price range
Okay$6.11–$22.30cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+2.0%90-day search growth — must beat 0% to launch
Review moat
Bad4,428avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Competition
Bad75%top-5 click share — a locked-up shelf
Brand share
Bad98%top-5 brand share — brand-locked demand