On April 21, 2026, oil markets responded sharply to escalating geopolitical tensions after Iran formally refused to attend negotiations in Islamabad, leading to the cancellation of VP Vance's flight and leaving no diplomatic talks scheduled ahead of the ceasefire deadline set for Wednesday midnight ET [1]. The lack of progress on the diplomatic front has heightened risk-off sentiment, with Sunday's cheat sheet assigning a 35% probability to a risk-off scenario and explicitly warning that a WTI close above the $90.70 range ceiling would signal a transition from a range regime to a spike regime [1].
By Tuesday's close, WTI crude oil settled at $91.18, decisively breaking above the $90.70 resistance level and confirming the onset of a spike regime in oil prices [1]. This technical breakout is seen as a direct market reaction to the absence of negotiations and the cancellation of diplomatic efforts, with traders now anticipating sustained volatility and upward pressure on oil prices as the ceasefire deadline approaches [1].
Market analysis from the source emphasizes that the original scenario probabilities remain intact, but the environment is now more risk-off due to unfolding geopolitical developments. The technical indicators suggest that momentum currently favors the bulls, with support at $90.70 and resistance at levels above $91.18 [1]. Traders are advised to closely monitor the ceasefire deadline for any news on renewed diplomatic efforts, as any developments could trigger further price action [1].
The source also recommends implementing risk management strategies in light of the elevated geopolitical tensions and the increased probability of risk-off scenarios, highlighting the importance of tracking both technical signals and diplomatic news before Friday's market close [1].
CONCLUSION
The breakdown in Iran ceasefire negotiations and the absence of diplomatic progress have pushed WTI oil prices into a spike regime, closing above key resistance at $91.18. With the ceasefire deadline looming and no talks scheduled, markets are bracing for continued volatility and upward pressure on oil prices.