Gap Percentage Calculator

Measure an opening gap from the prior close.

MANUAL INPUTS

Enter the planning values

1 · INPUT

Use current values

Copy inputs from the exact account, platform, contract, journal, or official rule source.

2 · CHECK

Read every output

Gap percentage = (open − prior close) ÷ prior close × 100.

3 · REVIEW

Save the decision

Record what the tool changed, then compare the plan with what actually happened.

Educational-use notice. Manual-input tools cannot verify live prices, contract changes, fills, firm rules, or market conditions. Verify binding information at the official source. No output is investment advice or a guarantee of profit, funding, account survival, or payout.