diff --git a/pkg/argus_wasm_bg.wasm b/pkg/argus_wasm_bg.wasm
index d33a2b4..a268a4a 100644
Binary files a/pkg/argus_wasm_bg.wasm and b/pkg/argus_wasm_bg.wasm differ
diff --git a/src/lib.rs b/src/lib.rs
index 1da6eea..b962c30 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,6 +6,7 @@ extern crate serde;
 extern crate serde_wasm_bindgen;
 extern crate web_sys;
 
+use js_sys::Math::sign;
 use wasm_bindgen::prelude::*;
 
 use argus::expr::{Expr};
@@ -75,6 +76,14 @@ pub fn eval_boolean(s: &str, js_trace: JsValue) -> JsValue {
     let m = TraceMap{traces: traceMap};
     for name in m.signal_names() {
         console::log_2(&JsValue::from_str("signal name:"), &JsValue::from_str(name));
+        let signal: &Signal<f64> = m.get(name).expect("bla");
+        if let Signal::<f64>::Sampled { values, time_points } = signal {
+            for i in 0..(values.len()) {
+                console::log_2(
+                    &JsValue::from_f64(time_points[i].as_millis() as f64),
+                    &JsValue::from_f64(values[i]));
+            }
+        }
     }
     // parse property string
     let parse_result = argus::parse_str(s);