Color: 'rgb(255, 159, 64)',
                            tension: 0.1
                        }
                    ]
                },
                options: {
                    ...chartOptions,
                    scales: {
                        ...chartOptions.scales,
                        y: {
                            beginAtZero: false,
                            title: {
                                display: true,
                                text: 'Spread'
                          