Count usable calls, not marketing calls
A posted idea is not necessarily a trade you could take. Remove duplicates, calls outside your trading hours, entries that arrived after the stated price, and signals missing an exit or invalidation level. Use the remaining count in the worksheet. If a provider publishes 60 alerts but only 12 fit your account and schedule, the denominator is 12.
Keep the provider fee separate from strategy expectancy
A positive win-rate claim cannot pay a bill by itself. Calculate expectancy from your own executable wins and losses, then subtract execution costs and the per-trade fee allocation. If the provider only publishes gross examples, the fee hurdle is still real while the gross edge remains unverified.
A trial that can fail honestly
Record every call as received, including edits, misses and no-trades. At the end of the trial, compare your filled price with the published entry and count only trades you could actually execute. Cancel if the usable-call denominator or evidence quality falls short of the price, even if a showcase screenshot looks impressive.
Worked subscription test
Suppose a service costs 99 currency units a month. It posts 40 ideas, but 18 arrive while you cannot trade, six are duplicates and four lack an executable entry. Twelve remain. The worksheet allocates 8.25 units of the fee to each usable call. At 100 units of planned cash risk per trade, that is a further 0.0825R to earn before paying for spread or slippage. Recalculate with your own ledger; the example does not describe any listed provider.
Keep a decision record
For each trial month, retain the invoice, renewal date, original call count, usable count, reasons for exclusion and your actual fill prices. Record whether the provider's published outcome used the same entry and exit rules available to you at the time. A service can publish plenty of valid research yet be poor value for a reader whose schedule makes most calls unusable. Set a cancellation threshold before the trial, then apply it to the complete month rather than to selected winners.
When a review score is editorial
Do not confuse a site's weighted editorial assessment with customer satisfaction. Keep the criteria, weight changes and review date visible, and never fabricate a user-review count to make a provider look popular. For the reader's own decision, write down which criteria matter to their account before opening the rankings. Evidence quality and subscription fit can point in different directions; a credible provider is not automatically good value for every trader.