From this graph when would you predict the next reversal occur and why?

Without seeing the specific graph, I can only provide a general response. Typically, a reversal in trends can be predicted by identifying key support or resistance levels, as well as patterns such as head and shoulders or double tops/bottoms. If the graph shows signs of weakening in the current trend, such as decreasing volume or divergence from indicators, a reversal might be imminent. Additionally, the timing of market events or news can also influence potential reversals.