System Builder ?

What it does

Pick a prop and stack any filters. The page instantly shows how that exact situation has done in the past, a system, and lists every player on tonight's slate who fits it right now. Nothing to submit: every change re-runs the system, and the address bar keeps your filters so you can bookmark or share a system.

How games are graded

Only real Hard Rock Bet closing lines count. A system of "SOG Over 1.5" uses only games where Hard Rock closed that player at 1.5, graded at the real closing price. Hard Rock's archive starts with the 2024-25 season, so that is where history begins. No other sportsbook is used.

Voids are left out: a skater who did not dress, or a goalie who did not start (saves count starts only). Overtime counts and shootouts don't, the standard settlement for NHL player props. Goals lines are over-only at Hard Rock, so Goals has no Under. Regular season only unless Include playoffs is checked.

Filters (all as of that game's morning)

Every filter uses only what was known before that game, so a past result means what it would have meant to bet it. Numbers take a comparison: < ≤ = ≥ >. Leave a box empty to ignore the filter.

• Line: Hard Rock's line for that game.
• Opp rank: the opponent's rank, 1-32, where 32 allows the most. Shots on Goal ranks by shots on goal allowed per game; Goals/Points/Assists by goals allowed per game; Saves by the opponent's own shots per game (more shots = more save chances). It uses the season to date before that game, and last season's final table until a team has 10 games.
• Shot %: the player's share of his team's shots on goal in the games he played. Season = this season before that game (last season until he has 5 games); L10 = his previous 10 games. "=" matches the whole percent (9 = 8.5-9.49).
• TOI L10: average minutes over his previous 10 games.
• Team days off: days since his team's previous game this season. 0 = second night of a back-to-back.
• Goalie days off (Saves): days since that goalie's previous start this season. 0 = started yesterday too.
• Fav / Dog: his team's Hard Rock moneyline for that game. Odds: the price of the side you picked (e.g. ≥ -150 drops heavy juice).

Reading the results

Hit % = wins ÷ (wins + losses). Break-even is the hit rate the average price needs just to break even. A system is only interesting when Hit % clears it. Units and ROI stake 1 unit per bet at the real closing price. By season shows whether an edge held up or was one hot stretch. Small samples (under ~100 bets) swing wildly; treat them as leads, not proof.

Tonight lists players on the next slate with a Hard Rock line who match every filter, using their numbers as of today and tonight's current line and price. In system is that player's own record inside the system. Lines refresh about every 30 minutes; finished games join the history overnight.