Algeria runs two FX worlds in parallel.
The Bank of Algeria sets an official rate every business day. It's the rate that applies to state imports, government transactions, bank-handled remittances, and most legal financial flows. It moves slowly — the central bank manages it.
The parallel rate is what an individual gets at an exchange office or on the street when changing dinars for euros or dollars. It moves faster, reflects scarcity, and typically sits 40-80% above the official rate.
For listed Algerian companies, the gap matters. Most earn dinars but buy imports priced in foreign currency. A widening gap squeezes margins. The top ribbon shows both, and the 30-day movement says whether the gap is opening or closing right now.