diff --git a/regression.py b/regression.py
new file mode 100644
index 0000000..b5fd14c
--- /dev/null
+++ b/regression.py
@@ -0,0 +1,99 @@
+import datetime
+from pathlib import Path
+
+import fire
+import matplotlib
+import matplotlib.pyplot as plt
+import scipy
+import numpy as np
+import pandas as pd
+
+from wsgi import create_fig, create_plot_df, plot
+
+import matplotlib.dates as mdates
+import matplotlib.pyplot as plt
+import matplotlib.ticker as mtick
+
+
+def create_dfs():
+    last_file = sorted(Path("data").iterdir())[-1]
+    key = last_file.name[:10]
+
+    with (Path("data") / f"{key}_data.ods").open("rb") as ff:
+        df = pd.read_excel(ff, sheet_name="digital", index_col=0).astype(
+            {"Digitale Befragung": "Int32"}
+        )
+    with (Path("data") / f"{key}_state_data.ods").open("rb") as ff:
+        df_state = pd.read_excel(ff, sheet_name="digital", index_col=0).astype(
+            {"Digitale Befragung": "Int32"}
+        )
+
+    plot_df = create_plot_df(None, None)
+
+
+    return df, df_state, plot_df
+
+
+def main():
+    df, df_state, plot_df = create_dfs()
+
+    plot(plot_df, landesbez_str=[None], max_shading_date = "2023-10-02")
+
+    plt.gcf().set_size_inches(10, 5)
+
+    target_time = pd.Timestamp("2023-10-01")
+    xlim = plt.xlim()
+    plt.xlim(xlim[0], pd.Timestamp("2023-10-02"))
+
+    plt.ylim(0, 3500 * 1.025)
+
+    data = plot_df.dropna().sum(1)
+    data = data.iloc[3:]
+    casted_timepoints = data.index.to_numpy().astype(np.int64)
+    reg = scipy.stats.linregress(casted_timepoints, data)
+
+    print(f"Regression R^2: {reg.rvalue**2:.6f}")
+
+    date_range = pd.date_range(start="2023-08-21 10:00:00", end=target_time)
+    date_range = date_range.to_series(index=np.arange(len(date_range)))
+    date_range.loc[len(date_range)] = target_time
+
+    regression_curve = lambda x: reg.intercept + reg.slope * x.astype(np.int64)
+    vals = regression_curve(date_range.to_numpy())
+    print(f"Projizierte Teilnahme am {target_time}: {vals[-1]:.2f}")
+    now = pd.Timestamp.now()
+    print(f"Projizierte Teilnahme jetzt: {regression_curve(pd.Series([now]).to_numpy()).item():.2f}")
+
+    print()
+
+    for target in [1500, 2500, 3500]:
+        target_reached_date = (target - reg.intercept) / reg.slope
+        print(f"Ziel {target} erreicht am {pd.Timestamp(target_reached_date).strftime('%Y-%m-%d %X')}")
+
+    num_skipped_days = 2
+
+    x = date_range.to_numpy().astype(np.int64)
+    curr_time = x[data.index.argmax() + num_skipped_days]
+
+    delta = 3500 - data[-1]
+
+    target_line = data[-1] + delta / (x[-1] - curr_time) * (x[data.index.argmax() + num_skipped_days:] - curr_time)
+
+    plt.plot(date_range, vals, label=f"Lineare Regression ($R^2={reg.rvalue**2:.3f}$)", color="tab:blue", zorder=1)
+    plt.plot(date_range[data.index.argmax() + num_skipped_days:], target_line, label="Ziellinie", color="tab:orange", linestyle=":", zorder=1)
+    # plt.gca().relim()      # make sure all the data fits
+    # plt.gca().autoscale()  # auto-scale
+    plt.xlabel("Zeit in Tagen ab dem 15.08.")
+    plt.axvline(x=target_time, color="tab:red", linestyle="--")
+    plt.legend()
+    plt.gca().xaxis.set_major_locator(matplotlib.ticker.NullLocator())
+    plt.gca().xaxis.set_major_locator(matplotlib.ticker.NullLocator())
+    plt.gca().xaxis.set_major_formatter(mdates.DateFormatter("%d.%m."))
+
+    plt.gca().set_xticks([target_time])
+    plt.title("Projektion Teilnahme an Digitaler Beschäftigtenbefragung")
+    plt.savefig("plots/regression.png")
+
+
+if __name__ == "__main__":
+    fire.Fire(main)