hover = HoverTool(
    tooltips="""
    <div>
        <div>
            <span style="font-size: 10px;">@names</span><br />
            <span style="font-size: 10px;">@dates</span><br />
            <span style="font-size: 10px; color: #696;">@x, @y</span>
        </div>
    </div>
    """,
    point_policy='snap_to_data'
)

TOOLS = ["resize, crosshair, pan, wheel_zoom, box_zoom, reset", hover]

# Initialize the graph
p = figure(tools=TOOLS, webgl=True, x_range=(-bound, bound), y_range=(0, bound), lod_timeout=1000, lod_factor = 10, lod_interval = 300, lod_threshold=10)