EP385: Stop guessing your next Amazon FBA purchase order and protect your cash flow from expensive markdowns
13 Sept 2026 · 6 min
Neil Twa explains why Amazon FBA sellers should track units sold per day instead of revenue to avoid overstocking and markdowns. David grew from $30K to $1M monthly revenue using a velocity-tracking system with 7-, 28-, and 90-day windows. The episode includes a three-step reorder checklist to protect cash flow.
This is the High Voltage Business Builders Podcast, daily intelligence for serious e-commerce portfolio builders across Amazon, TikTok Shop, Shopify, Walmart, and every channel that moves the needle. Neil Twa and his Voltage team, all day, every day since 2012. Let's get into it.
You are still guessing your next Amazon FBA purchase order because you are looking at revenue instead of units. I'll close with the Voltage 3, today's challenge. The units per day number that says reorder now, the SKU already heading into a markdown, and the cash you keep by waiting on the next inbound. But before I unlock today's Voltage 3 insights, look at the math. A product selling 84 units over 28 days moves 3 units a day. That is velocity. Now take 60 units in stock, divide by 3, You have 20 days of inventory. If your supplier lead time is 30 days, you are already dead. You will stock out. Or worse, you order too late and pay expedited freight. That is where cash flow dies. I was reading a Practical Ecommerce piece earlier, and it made this clear: revenue is vanity, velocity is sanity. 2 products can make $10,000 a month. One sells 20 units at $50 each. The other sells 400 units at $25 each. Same revenue, totally different risk. The second one needs reordering twice as often. If you ignore that, you bleed. Across my 30 brands, we watch velocity first. We do not trust the revenue line alone. It lies. It hides the real cash flow trap. Most sellers wait until inventory days drop below lead time. Then they panic. Then they overorder. Then they get stuck with dead stock. That cycle kills margin. That cycle kills freedom. I homeschool my daughters. I am home every day. I cannot afford to have my business steal that time with emergency sourcing calls. Velocity tells you the truth early. It tells you when to act. It tells you when to stop. That is how you protect cash flow. That is how you sleep at night. You stop guessing. You start knowing. Let's talk about David. He's one of our operators. He was doing $30,000 a month. Solid. But he was guessing on inventory. He looked at total sales, saw a dip, assumed the trend was over, cut his next order by half. Demand rebounded. He was out of stock for 3 weeks. Lost ranking. Lost customers. We rebuilt his velocity model. He started tracking 7-day, 28-day, and 90-day windows. He saw the acceleration early, ordered on time. Now he is at a new high of $1 million. $930,000 a month in June. 6 SKUs became 100+, but it started with one number: units per day. Not revenue, not feelings, not hope. He stopped guessing, he started calculating, and that changed everything. I have seen this pattern across our portfolio. Operators who track velocity win, operators who guess lose. It is not about being smarter, it is about being systematic. It is about respecting the data, It is about knowing that a slow week does not mean a dead product. It might mean a seasonal lull. It might mean a competitor issue. It might mean your ad spend dropped. But if you do not look at velocity, you will never know. And that ignorance costs you real money. Real cash. Real margin. David proved that. He stopped guessing. He protected his cash flow, and he scaled to a level most operators only dream about. That is the power of velocity. That is the power of knowing.
If you want the CEO Operator Blueprint, join Neil Twa, CEO of Voltage, on the next live workshop. He goes over the 5 steps to building generational wealth through almost automated income with FBA. Save your seat at voltage dm dot com slash AI workshop. And now back to the podcast.
Here is the Voltage 3. Number 1, Calculate your daily sales velocity for every active SKU. Take units sold in the last 28 days, divide by 28. That is your true speed. Check: You have a spreadsheet or tool showing units per day for each product. Compare that velocity to your supplier lead time. If your inventory days are lower than your lead time, you are at risk. Place the order now, do not wait. Check: Your next purchase order is placed before your inventory days drop below your lead time. Number 3, flag any SKU where velocity has dropped more than 40% over the last 90 days. That is your warning sign. Decide: promote, bundle, or stop buying. Check: you have a written decision for every slow-moving SKU. Complete all 3 before the next daily episode. That is your challenge. That is how you stop guessing. That is how you protect your cash flow. That is the Voltage 3. Complete all 3 before the next daily episode. You are drowning in tabs, ads, listings, inventory, pricing. You have too many numbers and not enough time to make the right call. AI is supposed to be the fix, but if your data is bad, you just make expensive mistakes faster. That is not freedom. That is chaos with nobody steering. Here's the fix. Cayman Data AI pulls your live Amazon numbers into one clear picture. You see what is working and what is costing you money. No more spreadsheets that eat your week. You stay in charge. You see the reason before you say yes. Nothing runs without your approval. This is what Voltage has done for operators for 13 years. We help you protect your margin and grow without losing control. Join the Voltage Business Builders Cohort. It is an elite, invite-only community for operators ready to build to exit. You get access to over $1,000 a month in proprietary AI tools and Including Cayman Data AI, plus operator-led guidance. Go to voltage dm dot com. We will see you back here tomorrow. Until then, stay high voltage.
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